I dunno, even with all the tools she had in the past, actually guard crushing someone in CS1 or CS2 was still pretty rare.
Also, one of Mu's biggest strengths (IMO) was the fear of the guard crush. I get alot of hits by people trying to avoid being put in a primer critical state. By nerfing that, they are really hurting Mu's game. Really, the nerfs seem pretty harsh this time around.
Also, the reason we lost primer breaking charged lasers (CS1>CS2) is because of the improved tracking, that would have been dumb.