I personally disliked all the re-designs,
scarecrow was no longer this geeky professor gone mad kinda deal, madhatter was well....more like the one from alice in wonderland,
killer croc was
, as for joker I much prefererred him in Justice League.
who else? riddler gone bald..nope not my thing.
Two-face had minor changes, so no big deal there.
can't think of anyone else?