Nah, Zero is still going to win imo. He's still the best Smash 4 player by far.
Ranai pls win Evo.
Bayo is slowly getting more representation at tournaments and showing to be a fantastic viable solo character. I don't think she is absolutely broken, but she does have some dumb stuff. Being at risk of dying because she WT'd a Jab is dumb no matter how you put it (WT in general is a pretty busted move imo). In addition, being able to 0 to death a majority of the cast off of a side-B is insane. However, I still think it's too early to outright ban her like a lot of the Smash Community wants to do. Unless she wins something huge, like Evo, Pound, etc. I will still think that she isn't ban worthy.
Also, a vid that shows how to escape the 0 to death. Unfortunately, you will still get combed.
Rosa on the other hand, only really has Dabuz consistently making top 8 with her, so I don't think she is that much of a problem in terms of balance.