His F-Air isn't as great a spacing tool as people would like to think.
It IS a good move, yes. But, you're suggesting that people are going to respect it.
F-Air has quite a bit of startup, and nutty players will just mash something stupid and stuff it.
You can argue that the Ganon getting stuffed out of moves has bad spacing, but when you consider that Ganon is a character who can get klink'd out of strong moves with seemingly weaker ones (Ganon Kick doesn't beat Falco's dash attack when they collide, as an example)
When it comes to approach options, I'd like to see more for this character.
No, making Ganon Kick into a new Sonic spin dash is not the way, but I'd like to see SOMETHING.