I just had the privelidge to try out the current version of this, and I spent most of my time playing young/toon link. There's obviously a bit of controversy over having to mash two different characters together, and I understand that. I just want to help combine two parts and not make those parts clash horribly.
I play young link in melee, and I think the most defining aspect of young link is his projectiles. They rock up damage and are meant to combo into other attacks. You added a lot of young links attacks that those projectiles combo into, but the current toon link projectiles don't do that the same way that young link's do. The arrows especially feel weird with the current moveset. They're slow and straight, menaing easy to avoid, and don't do the right thing when they hit. The bombs don't get thrown as far as they do in melee, and I don't see how making his throwing range better can be a bad thing. His boomerang felt a little weird, but there are a million weird melee properties to it. I guess I felt fine with how it handled for the most part.
I know that you have to cater to toon link too, but projectiles were major to young link's game, and without them a lot of his attacks lose half their viability because they can't be comboed into. I don't know what toon links feel about this, but that's just my standpoint from young link's perspective.