Supercruise is absolutely fine the way it is for me. Basically our ship doesn't really move fast, the frameshift drive just shortens the range be compressing space in front of us. Of course we can't move around like with the normal space flight model. It's absolutely fitting in my book. Science.
There is no disagreement regarding the - extremely hypothetical - "science" aspect. Including the "not moving" part.
But you have to admit that SC currently is somehow eventless and longer travels (> 3000 ls or so) could be more interesting. "Interesting" in computer games is achieved by interaction with the game world. In our case: celestial bodies.
I'm not saying its terrible now.
I'm not even saying that a new game mechanic should be mandatory for traveling around.
But I think there is no harm in making a major part of the game more interactive fun. (For those who want to take advantage of the possibilities; others might still fly in a compfortable straight but also slower direct line.)
(Oh... and as the background science is
extremely hypothetical, there is no reason why the "drifting" and "gravity-boost-interaction" parts shouldn't be completely reasonable possibilites in such a non-movement movement.

)