I mean, I think it's near unanimous that people want custom moves.
But that poll's asking a loaded question. Allowing custom moves means inviting all the logistics issues along with them.
If only the developers had offered up better unlock methods for that specific group of unlockables.
Let's not forget that the
Standard Custom Moveset Project is a thing and, with community support, solves the biggest logistical problems with custom moves. All you need is one 3DS with all custom moves unlocked, something easily achieved with Powersaves or simply calling upon the local scene and having someone who inevitably has all of them unlocked. It's simply a matter of setting aside the time to get all the setups ready prior to the tourney.
I'm sure if this was more widespread (along with the ability to use custom moves in general), that we'd have little to no problems.
Sonic obviously, Fox has his somewhat-safe dash attack, but Falco?
I almost want to fight you with my Falco, if you haven't already.
Believe it or not, but Falco does have a lot of capable tools that make him a strong character. He's not fast, but he's quite strong and has safer KO options than Fox does, as well as a projectile to zone opponents with, a Reflector that can be used offensively, and solid gimping options including his side-B.
To top it off, he's not as fragile as Fox is, and in my opinion is more likely to survive at high-percents due to not having Fox's fall speed and weight.
To give an idea of Falco's options, all of his aerials except nair can kill before %180 when fresh; bair can kill most characters before %100, dair is a meteor when sweetspotted (same timing as Falcon/Dorf's), fair can be used not only to kill from the side but to drag your opponent down, and uair is fast as kills as well as Fox's without the possibility of whiffing mid hit, since Falco's uair is only one hit.
With regards to Fox, I've found only two of his aerials can reliably kill, being bair and uair. Uair is the same as Falco's except it's two-hit and you can miss the second hit, and bair is more often used for stage spikes than anything. Think about it for a bit.
I actively play as both space animals, so I'd like to say I know what I'm talking about. I actually use Fox versus other Falco players and vice-versa because I hate mirrors and enjoy these matchups more.