If that means we can finally have Ganon use his energy tennis balls, then I'm all for it. Would also be up for trident shenanigans.
Pig Ganon doesn't even use the move. Ganondorf used it... once. Some characters associated with Ganon/dorf do use it, though. Phantom Ganon(who actually uses it more than Ganondorf games-wise), Agnahim, a Blue Stalfos, and some unrelated Poe Sisters. Basically, Dead Man's Volley is just a recurring boss move at this point. It'd be nice if Ganondorf appeared again and used it, or regular Ganon used it even once. By the time Brawl came around, the move got used by characters like Blue Stalfos as is, which is part of why it doesn't really fit onto Ganondorf anymore.
That, and Ganon has his own projectiles, the Fire Bats.
In a twist, Ganondorf using his swords is actually not canon either in Ultimate, since that's from a non-canon space demo version. He solely uses them as Pig Ganon in OOT, and only during WW and TP as Ganondorf. Only 4 had him use his sword accurately via a custom move. It's kind of funny that way, really. People keep asking for a canon version, yet Sakurai does his best to move him further away from canon in Ultimate.