I've been playing Corrin and Bayonetta since last night and these are my thoughts.
First off, thanks [tornado fang]ing Sakurai. Their voices are super compressed. They sound like they're in an early PS1 game. I'm serious, it's REALLY bad. Even with music cranked up it's super noticeable.
Now anyways, Bayonetta plays like a weird ZSS/Ryu hybrid. She's very combo heavy and her punish game is really great. I like playing her. She's a bit hard to pick up though and I still need a LOT of practice before I can play her competently.
Corrin, granted, despite having a lot of differences, at her (I play femcorrin, male robin still based tho) base, she's Marth Clone #4 which really sours my experiences with her. She's also Cloud-tier broken. She's the anti-Cloud, looks like. Playing her is boring and I expect fighting her is infuriating. I will give her this though, she has a lot of fun techniques to her.