Kirby is definitely one of the very, very few characters that benefited greatly from patch 3.0. The buff to his copy ability and n-air lag are changes that the community and I have been asking for over the past few months, and it's a really good step in the right direction for the future of his meta. The quality-of-life change to up-b is also welcomed, because it makes his recovery slightly less susceptible to ledge guards. I'm really hoping there'll be a trend of Kirby buffs in upcoming patches that'll hopefully address the god-awful lag and unreliability factor in most of his specials - a slight increase to airspeed would also be greatly appreciated, of course.... But at least inhale is a more rewarding move this time around, so I'm hoping that I'll see it more in his meta.
But I'm digressing a bit. I feel like Kirby's going to be in a fairly decent spot- probably mid tier, AT BEST in current circumstances. Kirby has a pretty good neutral game, and can combo really well on low percent opponents. As of late, I've seen some great Kirby games from a few competitive players. His f-smash is pretty damn strong, his u and d tilt are amazing moves that can string or combo into almost anything else, and I've seen some really strong follow-ups from landing a falling f-air. Like I said, to me his most glaring flaws are his specials - notably down and side b - and air mobility. Fingers crossed that these issues are primarily addressed - and for the love of god, no nerfs please... That said, I would be quite astonished to see Kirby in the bottom 5 again, let alone bottom 10 - I can already think of 10 other candidates that would be better fits in that category, and Kirby sure as hell ain't one of them..