She's definitely harder imo.
She lost a lot of midscreen damage (but so did a lot of characters), it's much harder to get hitconfirms, and by extension, harder to get good damage. She has to rely on counterhits a lot, it seems like or very short combos, at least midscreen. Her zoning is better, at least.
She feels a lot more rewarding though.
It's more that it seems like they toned down her oki game (a lot), and that was my favorite thing about her.
I loved when i got my opponent in knockdown in cs1 with mu because it was like opening the gates of hell on them.
now in cs2 after i get a knockdown i'm just like "Woo, i gotta get in again..."
unless i'm in the corner, and since mu is a zoner she's ... not really supposed to be a corner carry character.
How am i supposed to get my opponent into the corner when i'm turtling/running away for the majority of the match?
Her whole design just seems flawed, to me now...
I don't think i worded this correctly at all but hopefully you still get what i'm trying to say in my incoherent rambling. :/