I hope Kerbals can traverse adjoining sections like the fuselage of crew cabins, control rooms and space station habitats, operating controls, airlocks and experiments (rather than just switching too). A kind of end game for completed vehicles.
Nothing wrong with a relaunch if only to modernize graphics (which KSP2 has added me already!), though as a standalone v2.0 would transverse KSP into a classic, better and un-ruined.
Is KSP2 going to have logistics? Like hungry Kerbal, food, water and oxygen supply, to add cargo weight to all crewed missions.
Hungry Kerbal could be a gaming setting, on, off.