It's hard to be excited about the possibility of Geno when him being in Smash probably wouldn't lead to him being used in any other games. Like how Marth and Roy revived interest in Fire Emblem, Ness and Lucas doing the same for Mother, or, more recently, the assumption that K. Rool will be in games again. Geno will still be owned by Square, but not Final Fantasy-y enough to actually be in any of their games.
Smash is a kingmaker, but unless he's literally been bought by Nintendo/Sakurai, I can't see him getting anything out of this. Not to mention, having Mario, Bowser, Peach, and Geno, but no Mallow is creating a gap in a team that wasn't there to begin with. It'll feel lopsided at least to me. I would rather the ballot be used in conjunction with context of the games themselves, so you take popular picks who could use another chance in the limelight but actually feel like they were passed over. Being a fan favorite shouldn't be the only criteria, imo.
I'd rather the effort go toward Pig Ganon, Dixie, Incineroar, or Elma (all of the above, plz) to be cemented as Big Names, personally. And if it had to be "Nintendo character no longer owned by Nintendo that's never going to be on a Nintendo console again", Banjo & Kazooie seems like the logical pick.
But eh, if people want him that badly, I'll be happy for them. Don't yell at me for not wanting Geno, it's nothing personal.