1) A part of the game take place in a mushroom forest. So that is a bit greener.
2) The only thing I know is that some of the voice get redone. But for the slow down problems on some systems, I don't know, someone of the Larians should answer that one. But I'm rather sure of it that those problems are getting solved, since people could send their problems that they pass by, together with their systems specifications.
