After trying to condense the same number (230-280stars, 500-600 planets) of stars as vanilla Sector (164k*102k) in a smaller (60k*60k) Sector, I've noticed that core worlds are not positioned perfectly in the center of the starmap.
It's not very noticeable when the sector is big, but on the smaller one it's very jarring.
Basically, if you disable starscape to enable grid on starmap, Hybrasil is almost perfectly in the center of the grid. But if you mentally circle Core worlds, Askonia fits to be the center more.
https://imgur.com/a/LOCM9gmIt's not something this mod does, vanilla generated Sectors have the same problem. But would it be possible to do something about that? I've no idea how mapgen works, but it would be neat.
Also, after reducing ConstellationSize to 800 i've managed to cram adequate number of stars to 60k*60k Sector, but some of them generated inside core worlds. I don't constellations overlapping each other, but is there a option/parameter to make generated stars spawn some distance from core worlds?