I'd do something with supercruise.
It's very boring.
I get the space is big argument, but this is also a video game, so I don't see the need to sit in supercruise with zero gameplay in most cases for 5+ minutes.
I'd love it to be a lot faster paced, if you wanted it to be (boost, or FSD engineering for supercruise speed instead of range). Or jump to other stars.
Maybe even add some sort of super luminal combat... SC capable missiles and mines mostly.
Also add some stealth mechanics to supercruise to allow sneaking.
I'd also change PowerPlay, to open Only.
And remove the modules, and stick them behind tech brokers. Powerplay rewards would be rare materials of all types, in increasing quantities the higher rank you go, as well as increase the credit payout.
Plus being in hostile space would actually be dangerous, with NPC's seeking to destroy you, just for being there.
And replace the silly leaflet gubbins with various types missions, where your rewards are simply merits.