Mario actually has a grab game, and his quicker startup gives him superior mixups, with more guessing having to be done to not get grabbed and take 70% or get usmashed and die. Bayonetta has a superior punish game and longer limbs, but those don't equate to the same thing.
Luigi is much the same, with a better projectile to control space, but inferior mobility and landing options. His dash grab is straight broke, too, and his hitboxes and frame data allow him to create more ambiguous situations that lead into followups or death, of course.
I was wrong about ZSS and MK, I admit
Pit's entire STRENGTH is his neutral game, are you serious? He has tremendous space controlling options, forces the approach, has decent-good frame data, and a solid grab game (although not as good as the mario bros.).
Palutena's strength is her neutral game, too, I would say, but she has fewer potent killing options, and her damage output is mediocre, which is a lot of what makes her mid-low tier. But with superior mobility, a grab game (yes, that is very important), a practically unstoppable back air, and a better boxing game she edges out bayo in that regard.
Also it's important to keep in mind that even tho bayo DOES have burst mobility, unless she gets to the ledge, she's putting herself at risk by doing so. She doesn't have an aerial command grab, so long as you're diligent, you can punish special lag and condition her not to use it to escape as much. Sometimes you won't be able to and that's fine, and there are mixups that can make it harder, any competent bayo will try and use them to avoid punishment because landing with lag is a *****.