Ganondorf's moveset has evolved since Super Smash Bros. Melee and he cannot be defined as a echo fighter of Captain Falcon (though it's not really what you said). His moveset is pretty correct for the character he is and it has changed enough to make him unique. Though, I agree that having 3 damn Links is deceiving and I just wish they could just delete/change Toon Link. Keeping Young Link as the "old Link's moveset" and Link as "New Link's moveset" is enough.
None of the old Melee clones where ever true Echoes. They had subtle differences that where bigger in contrast with the original moveset than Echoes have with their original counterpart. Well, except for Ken. Ken is a weird exception. Isabelle fits the Melee style clone the best out of all the newcomers we've had. But then again, she's got unique attacks, but so did Ganondorf and Pichu.
Ganondorf is still mostly the same as in Brawl and Smash 4 however, but now he has a sword and doesn't suck (just look at Nairo's wreckage with the character!). But I think this is a healthy approach to older semi-clone characters. I will look forward to see them implement more changes to them over time.
And he'd be left-handed.
I actually really like the idea of OoT Link as an echo (well, I'd have switched them).
Though, they apparently really prioritize taunts for echoes. Guess you could bring back the fairy, but I'm really not a fan of that Melee taunt. Just what is that? And I think an exception should be made for the original taunt.
Hmm Link being left handed, would that make an impact on his playstyle as a Echo you'd think? It would be a real nice notch to the Zelda franchise however.
What changes I would implement for Ocarina of Time Hero of Time Link as a Echo of Breath of the Wild Champion Link is quite a lot actually.
-First I'd start with his Bombs obviously. Make them work like they did in Smash 4, that would be cool.
-Then there's the Hookshot, which is a huge advantage over regular Link, but then again, Chrom was superior to Roy for a long time as well, plus Champion Link would still have better edgeguardig due to Remote Bombs
-No sword beam at 0%.
-Make it possible to charge Spin Attack more than Champion Link, and at max charge, it'll have added range and send foes at a similar angle as in Melee, the NTSC version (I personally played PAL, so I want this).
-The fairy taunt comes back, but the vain hair swipe shouldn't. But I have a hard time thinking of something else because Hero of Time Link wasn't exactly very expressive.