Those are pretty much the main things. The MCSX endings for Dakota were removed because they were originally sort of jokey bad ends, and Westane decided he wanted to do major reworks on them after he finished Dakota and Ava’s routes, which is understandable, I suppose, though at the same time he could have left it in until the reworks were actually ready. There was also some noncon for Ava and Dakota that got removed when Westane dumped the energy system, but that was super simplistic and didn’t go anywhere. The rationale for dumping it entirely seems to have been that the whole point of the game is to bend consent with mind-altering chemicals, not go against it outright, which I suppose is justified. It’s not like the content that was there was even any good as noncon goes.
Beyond those, there’s a couple other things. The energy system got removed because it was a horrible slog of a grind. The worst loss is probably Diana’s scenes that originally used the energy system, since they were a lot better than the ones that replaced them. And of course the first thing that got removed was Tasha’s pussy, but that’s just a preference thing, I guess.