Deadpool:
About the Tornado Kick thing(I know it's old stuff but still)
I have an obvious reason:
Rockstar:If we put Johnny that Kick,he'll be way too OP...Let's just balance him a bit...
I also believe they took out the kick due that he wouldn't be using his TaeKwonDo Style on final game release...So it'd look very weird he made all those punches(Whose,are normal)and then suddenly deliver a super kick with perfect technique...It'd been akward...
About the Beta Showdown at the Plant:
That about the sludge...Shouldn't Jimmy disintegrate when he touches it? Even if it was kept on the final release...I think they wouldn't put the taunt sounds because,it's not usual to hear a some random guy laughing at your death...
And wait,can you actually get inside the elevator on the final release? If it's so,how?