Just thought I'd clarify, because you know how we like to get caught up in the minutiae on this Forum (of course, as Rebel Yell rightly points out, said PMF member is going to have to deal with the PP NPCs for that faction as well, such as they are).Yes, I got that.
But...
- the same applies to PP1, you can't tell if a pledge to another Power has any merits worth killing them over there, but most pledges don't go about attacking other pledges just for existing (yes, it's valid to do so, but it's not universal)
- on a diplomatic level, it might be better to accept a PMF with a mix of pledged supporters (and just compensate for the "passing traffic" losses some other way, if they're not deliberately trying to flip the system) rather than antagonise them and encourage them to make sure their territory does not overlap with ALD territory any more.
- the Power's supporters possibly get an incentive to attack the PMF's supporters (because they're also acting for an enemy Power), but that's not the same as the Power's supporters having an incentive to attack the PMF itself to change system control - something like the "Deliver Exploration Data" in the above screenshot would strengthen both the controlling Power and the controlling PMF if carried out by a supporter of that Power, for example.
Regarding the points you raise:
1. Regardless of whether a pledge to another power has merits worth killing them over, there is worth at a base level in PP2.0 in that (judging by the screengrabs) you'll be awarded merits or whatever PP2.0s equivalent is for neutralising them.
2. The diplomatic level is something that would need to be resolved at a organic player driven factional level, and something that is really out of the scope of something I can really talk about (being a mostly freelance player of late).
3. I can see where you're coming from, and something we'll need as a playerbase to keep an eye on after release, see what comes out of it.