This is why I prefer Goroh. People who would want him are more likely to want him for reasons other than "he can take ganondorf's old moveset if he was decloned". The same can also be said for Pico too.
I'd personally love to see Pico and Goroh to be completely honest
If there were to be an Echo of Captain Falcon, though, I'd personally say that someone like Bio Rex, Super Arrow or even someone like Beastman or Phoenix is more logical, purely because of body type. Black Shadow is significantly larger and with a bigger build than the Captain, so I don't know if the models would really work.
In terms of reworks, I think that at this point, rebuilding Ganondorf from the ground up is probably our best option. Hear me out here.
The thing is, it's widely accepted that after Ultimate or maybe an Ultimate Deluxe, well... we're going to have cuts. With a game like this, it's inevitable. The thing is, though, I feel like it's totally reasonable at this point to completely reinvent, or at least change up, characters. Say that there's only like 40 characters in the next title - it gives a ton of space to better fine-tune movesets and the like.
On Ganondorf himself, I'd love to see him use a trident. Sure, he often doesn't himself, but he does in the form of Ganon - and I think it would be a really cool, unique, and interesting way to take his design. a