As a new player i enjoy the large distances in this game. However, like others, ive found myself very frustrated to find my ship decelerating for no apparent reason when theres still a significant amount of time left before i get anywhere near my destination. Perhaps i just don't understand the complicated pseudo-science behind the frame shift drive, but if i know anything about physics then i know if you're going really fast and approach a massive body then you should start going even faster, rather than slowing down.
I'm not that educated with the explanation behind it, but I'll give it a shot.
Going faster if you're approaching a gravity well is your everyday expectation from Newtonian space. However, the FSD works outside Newtonian (or Einsteinian, for that matter) physics, and you'll have to accept a few new basic rules. One of them seems to be that the FSD works best (i.e. runs fastest) in flat space, far outside any gravity wells (which is, btw, a common theme for faster-than-light propulsion in SF). So you're faster the further you're away from all gravity wells. It may not be a matter of not being able to go fast near a planet - it may just be the problem of not being able to do so safely, which is why you get dropped out of SC with some damage if you SC too deeply into a gravity well.
My other comment is that the supercruise definitely makes space feel 'big', however, hyperspace does not. It feels kind of...pointless to me to supercruise around a system for 5 or 10 minutes when i know my ship has the capability of traveling those same distances in seconds. And it also raises all kinds of issues when I think that I can fly to any civilized system in the universe within 15 minutes or so. You're telling me that no one from any of those systems wants to bother flying a few hours further into the galaxy and terraforming a new planet? Even though tons of players are doing it just for fun? Yeah, that makes no sense.
SC vs. Jumpspace/Witchspace - jumping inside a system won't work unless you have a valid target you can find. Also a common theme in SF. Since jumping involves removing yourself quite far from the regular universe, you'll need an anchor to come back to. A star will usually serve. This doesn't explain why you can't jump to a different star further off in the same system, though. You might try it again with the relative depth and distance of the gravity wells (i.e. stellar masses). Oh, and btw again, most of the black holes in otherwise populated systems are actually rather small in mass.
Terraforming a new planet is a major endeavour. Look a the bubble as it stands currently, and you'll find a lot of unused real estate even inside the bubble. And a smattering of populated systems outside - thy're just hard to find. Here's a
hint. You may even occasionally find stations being constructed and planets being terraformed, but those are rare.
But if you look at the effort necessary to populate a new system inside the bubble (see Power Play, and some CGs), it's a miracle the bubble is as large as it currently is.