That's gonna be a hard no from me.
1: I don't really want there to be platforming sections in WoL.
2: No one uses the stage editor.
3a: I absolutely DESPISE of Geno. He was easily the worst part of the worst officially licensed Mario game. He had no character traits, no personality, no reason for people to care about him. He has nothing in his game that would be able to be turned into a full moveset. (And before you say anything about Duck Hunt, watch RelaxAlax's video on him. He actually had a lot to go off of, since he was a representation of the Zapper as a whole.) There are so many more fighters that would deserve to get in more than this flimsy plywood playdoll. There could not be a character that I'd want less. He doesn't deserve to be an assist trophy, a spirit or a mii costume. If he gets in the game on the Fighters Pass, I will break my Switch in half, and that is a promise.
3b: Some random kid from an FE ripoff doesn't deserve a spot on the roster. Stay in the assist trophy.
3c: Skull Kid hardly even played a role in Majora's Mask. Also, MM was probably the worst 3D LoZ game.
3d: Duck hunt.
3e: Tails is the only character on this list that I'd actually want. A few more sonic reps would be nice to see in a smash game.
3f: I don't really have an opinion on Rayman. I've never played his game, so I have no idea if he'd actually be a good character in smash, but Ubisoft and Nintendo are best friends at this point, so I would not at all be surprised if he got put on the Fighters Pass.
3g: We have the 3 DK reps that actually matter, we don't need a 4th.
3h: ...sorry who? (I do actually know who they are, they're just too irrelevant for me to want them in smash.)
4: We already have way too many stages in the game, we don't want more.
5: No one actually cared about Trophies.
In other words, I would not want any of these features in the game period. Even if it meant the game was released now, I still wouldn't want it.