Which champion needs a rework the most?
A lot do but I personally think 
A lot do but I personally think 
I would've said Poppy, but she's already in line for a rework right now.
GP's always been a good contender for a rework in my opinion.
Yorick, then Poppy, then Galio.
People are always talking about Urgot, but I'd argue that you could pretty much just redo his ultimate and split up his kit a bit (so his combo isn't always just WEQQQ) and he'd be interesting.