I dont know about the starfox placing, to be honest, I only used fox against jiggs and ICs in melee and play him once in a while in PM, but it seems like the other melee character are getting left behind. They need to be buffed for real.
I honestly think a lot of them are overrated because players more experienced with their characters tend to pick them up.
ICs are pretty bad from what ive seen, and jiggs is pretty much atrocious in this due to everyone having decent ranges or projectiles.
Some of peach's stuff like her landing lag on up b and her horizantal movement were nerfed since melee, kind of makes her worse, even though she got minor tweaks.
Sheik lost her free combo grab against everyone in the game which is understandable, but she should have recieved a little more to compensate.
Marth sucks on these stages, literally makes him obsolete against fox most of the time.
Spacy recoveries are smaller, plus the slightly deserved nerfs. Theyre fine though, but their recoveries are really awkward and not smooth compared to melees.