Make your ship fly more like it does in real space with 6DoF and FAoff type maneuvers, make velocities more volatile and more affected by gravity, make heat and gravity more of a factor across the board, make slingshotting a thing, make solar flares scoopable for different types of effects from different stars with correspondingly different risks, let us use the FSS, DSS, KWS, and maybe Manifest Scanner in supercruise at any speed, and let multicrew members independently target scanners to resolve contacts and highlight targets for the pilot ala wing target highlights. Boom done you’re welcome.
YES. I don't care if you're a man, woman, dog or a refridgerator, I want to marry you. Have an imaginary extra double-triple-like because what you're describing there, now that's engaging gameplay.
The current supercruise is just a way of getting from one location of actual gameplay to another.
Figure 1. Supercruise.
Now imagine if other games insisted on doing the same, just artificially bloating the map size until all relevant locations were placed 20 minutes of mindless travel from each other. And if you don't enjoy that, you somehow hate the game? WAT?