He punches in Smash and punches in OoT.
If you want him to throw energy orbs, that will be like giving DK in Smash a barrel throw. It wouldn't fit either of their close-range heavy designs at all.
I'm of two minds with this. On one hand, yes, if a character has a lot of moves that don't fit their intended playstyle, they tend to suffer for it due to lack of moveset cohesion. This is a fan game example, but SSF2's take on Bandana Waddle Dee is, to me, a poster child for this problem.
None of his moves fit together well as a moveset (or even thematically, seriously why does he have Beam moves for like half of his attacks), and he's honestly a total trainwreck of a character.
But on the other hand, at times an attack that "doesn't fit" is used to
complement the moveset instead of contradicting it. An example of this goes back to the original game: Captain Falcon. He's incredibly fast, still being the second fastest fighter on the roster after only Sonic, and he's able to bring out flashy, multi-hit combos in an instant. He rewards good movement and fundamentals incredibly well, and forces the foe to stay on their toes.
So why is his signature move an incredibly slow, highly telegraphed overkill option? Because the Falcon Punch is
flashy. It's a flex in attack form. And because of that, it fits well into Falcon's over-the-top extreme nature, even if the move specifically goes against his entire playstyle.
That's the kind of thing that I picture Dead Man's Volley as: a complementary move. Giving Ganondorf an attack that grows stronger with each reflection, and allowing him to have a way to quickly send it back while the foe doesn't,
exudes the concept of power, which Ganondorf is based around. The knowledge that you
need to respect this move, or else he'll just end your stock right then and there. It sparks
fear, totally befitting an evil warlock monster man. It also, as a result, gives Ganondorf something he's really missing: a safe way to approach. Wizard's Foot and lol Flame Choke just don't cut it. But adding projectile pressure? That absolutely does, and at the very least, it limits the ways rushdown opponents can approach
him, which is equally as important.
So while I agree with the sentiment in
some ways, there are ways where it absolutely does work. You can end up a Bandana Waddle Dee, or you can end up a Captain Falcon.