It's hard to determine which characters have "way too good" recoveries, and which characters have "seemingly really good because no one knows how to edgeguard them" recoveries.
For example, I hear people complain about Diddy's recovery a lot. Diddy's recovery seems impossibly good. However, because the longer you charge the further distance you go, there is only one moment in his entire charge process that he can sweetspot the ledge. As long as you threaten to edgehog during this moment (causing him to miss it by charging longer), Diddy will never sweetspot the ledge.
90% of people I play let me get away with sloppy recovering because they rush to the ledge and I wait out their invincibility frames. However, my practice partner just threatens to ledgehog me during the sweetspot, then...charges a smash. Since once I've charged too long it is impossible to sweetspot- I'm dead. He will tipper me as I cross the ledge, or dsmash me, or whatever he wants depending on the character he is playing.
It's especially bad against Marth and Roy.
Only one person in our scene does this to me effectively and consistently. I can very rarely recover with up-B against him without taking a punish of some sort. Everyone else runs around screaming "nerf Diddy's recovery it's too good zomg!" and lets me get back to the stage. I actually feel like a lot of characters have safer recoveries, even if Diddy gets more distance. (Though I wouldn't be opposed to Diddy having a couple extra frames of landing lag, it's extremely fast.)
I'm not saying Diddy's recovery is bad- in fact, it's above average and very good- but once you put in time in to figuring out how to fight it, on second look, it's not nearly as great as it seems to the uninitiated. The problem is that most people are way, way too jumpy to scream nerf instead of moving the metagame forward and figuring out punishes.
Unlike, say, Mew2King, who makes Diddy's recovery look like a free kill by shinespiking him consistently every single time. ._.
