Eh, Lv9 kirbies are too easy, I don't think I'd go there. I've beaten classic mode on the highest difficulty with no continues as Kirby in the first few days I bought the game, if that's any indication of how Kirby clicks for me. I was in the top 5 spots of my country's power rankings when Brawl was big, by only using Kirby and ZSS (but Kirby mainly).
Also I tried For Glory with straight-up Kirby, won some and lost some (stopped after 11 matches at a 55% win rate). I don't really like the buffering in the moves, it's just as bad as Brawl IMO. The connectivity's way better though, that's for sure, but accidentally rolling into my opponent when I wanted to charge an fsmash, or reading an opponent rolling behind me and trying to punish but the delay makes it so that they shield my attack instead both kill me inside every time.
I'm thinking of trying to get used to the new ZSS, and if I don't like it, I'll keep her as my Brawl main and look for another fast-paced combo-oriented rushdown character to main that feels natural. I'm the type of player that really knows how to read opponents, and once I'm in, it's pretty hard to get me out. Gotta get in dat there head and psych you out by not letting you do anything successfully!