First things first: contratulations @Bashy81 , you actually came up with something more complicated than current Powerplay! 
I don't like at all some of the things you proposed, for example the existence of any kind of overhead, which I believe is the real cause of the existence of 5C in Powerplay, I first will move a "design criticism" to your idea, then I will list all the things I liked (and I think they should be in in every kind of Powerplay proposal).
I think that speaking of "continuous territories" is pretty pointless in Powerplay (with one exception
), and that's two simple reasons: jump range and how witchspace functions in the Elite lore.
To make a practical example, when you used to control Gliese 828.4, for people not knowing a Antal control systems just in the middel of Archon territories, I literallyused to jump through the entire bubble when fortifying Jormor without actually landing in any of its exploited systems.
In Elite lore, only Thargoids can actually interdict through witchspace so I believe that, even if aesthetically appealing, this kind of approach makes more sense in a "ground control like" kind of mechanic, not the 5 dimensions space (witchspace is basically a dimension of its own) of Elite Dangerous.
But there's an interesting concept in that: isolated bubbles should be somehow damaged by just being far away from the closest allied control system, maybe with a malus to upkeep, fortification trigger or even expansion trigger itself. The concept of "vicinity" more than connection is very interesting and would mitigate some nonsensical trolling maneuvers like trying to prepare systems very close to the closest enemy HQs just to contest closest bubbles. On the other hand a bonus to fortification should be applied for systems with overlapping CCs, because having the strong connection you talked about before they'd be easier to manage. This is very interesting and should be something pretty useful when combined with weaponised for example.
Another "good point" I agree with: Powerplay needs a far better graphical representation to show people what's happening in the galmap: right now icons are quite ugly and confusing. I have few to propose about that, I really have no idea how you could make it better.
And... "slowing of pace"? Isn't Powerplay slow enough already?
This model more than a decentralized one seems to me a more "graphical way" to give indications to casuals. Problem is that with overhead some decisions will not be able to be taken by leaderships (and remember: we are self-appointed leaders, people just pledging couldn't care less about what we say or decide, and they'd have technically every right to think so). Being truly decentralized means that any maneuver would at least not harm your Power tactically speaking, I think this should be a milestone in everypossible future Powerplay iteration.
And now a little step back.
Or... should we?
I would actually have TONS of ideas to make Powerplay even more meaningful in the Galaxy: changing local security with Powerplay ships for good-alligned factions, decals, everything to make it more "vivid" and "appealing" to the new and older players, but the sad truth is that Powerplay should be almost "invisible" to grant us even the tiniest possibility to have it as we like it (you-know-what-I-am-talking-about-don't-let-me-write-that).
I will not even begin to list how cool it would be, how interesting it would make the Galaxy, but gameplay wise we need to push for a totally optional and almost imperceptible Powerplay, the reason is because people, and I think you perfectly know what I am talking about.
Anyway it was an interesting reading of course, we do not agree on many things, I would love to read some other ideas too.
I don't like at all some of the things you proposed, for example the existence of any kind of overhead, which I believe is the real cause of the existence of 5C in Powerplay, I first will move a "design criticism" to your idea, then I will list all the things I liked (and I think they should be in in every kind of Powerplay proposal).
I think that speaking of "continuous territories" is pretty pointless in Powerplay (with one exception
To make a practical example, when you used to control Gliese 828.4, for people not knowing a Antal control systems just in the middel of Archon territories, I literallyused to jump through the entire bubble when fortifying Jormor without actually landing in any of its exploited systems.
In Elite lore, only Thargoids can actually interdict through witchspace so I believe that, even if aesthetically appealing, this kind of approach makes more sense in a "ground control like" kind of mechanic, not the 5 dimensions space (witchspace is basically a dimension of its own) of Elite Dangerous.
But there's an interesting concept in that: isolated bubbles should be somehow damaged by just being far away from the closest allied control system, maybe with a malus to upkeep, fortification trigger or even expansion trigger itself. The concept of "vicinity" more than connection is very interesting and would mitigate some nonsensical trolling maneuvers like trying to prepare systems very close to the closest enemy HQs just to contest closest bubbles. On the other hand a bonus to fortification should be applied for systems with overlapping CCs, because having the strong connection you talked about before they'd be easier to manage. This is very interesting and should be something pretty useful when combined with weaponised for example.
I totally agree with that: in fact part of my proposal considered giving players a personal bonus if they contribute where it's most needed, to avoid people grinding without any sense in the same system.The nature, and progress of a Power and a conflict between Powers would all be visible on Galmap. A glance would tell you a lot. That easy-access to strategy, even if involving complicated mechanics, is more important IMO than the specific mechanics ive outlined, themselves.
Another "good point" I agree with: Powerplay needs a far better graphical representation to show people what's happening in the galmap: right now icons are quite ugly and confusing. I have few to propose about that, I really have no idea how you could make it better.
Honestly I am surprised we don't already have shaped powerplay bubbles.Other than providing a natural slowing of pace (to moderate the more dynamic attacking possibilities) & providing chokepoints for invasions, it serves to both decentralise strategy as is the OP intention, (by making strategy far more visible and accessible in-game) as well as providing easy-access to what is going on for outsiders. Id love for streamers to be able to do simple & yet meaningful Powerplay reports having Galmap as a primary tool. It would be extra-awesome if it didn't end up looking like geeks pointing at 3D space willies.
And now a little step back.
This is so Utopian of you, but very interesting. Makes me wonder: can we make of Powerplay something more than just missions, pew-pew and opposing triggers?This represents what happens to all factions & civilizations that surround themselves with like-thinking people. They start to believe their own propaganda that they are wonderful & Right, stop challenging their own ideas and become inefficient, decadent and begin a descent into decay & collapse. I.. dont need to colour-in a comparison with the Forums here.
Or... should we?
I would actually have TONS of ideas to make Powerplay even more meaningful in the Galaxy: changing local security with Powerplay ships for good-alligned factions, decals, everything to make it more "vivid" and "appealing" to the new and older players, but the sad truth is that Powerplay should be almost "invisible" to grant us even the tiniest possibility to have it as we like it (you-know-what-I-am-talking-about-don't-let-me-write-that).
I will not even begin to list how cool it would be, how interesting it would make the Galaxy, but gameplay wise we need to push for a totally optional and almost imperceptible Powerplay, the reason is because people, and I think you perfectly know what I am talking about.
Anyway it was an interesting reading of course, we do not agree on many things, I would love to read some other ideas too.