A lil bit ago I made a list of characters that I thought needed more knockback to be balanced. In that list I included Mario. I was playing him today, and due to his combo ability and his decent amount of KO moves I think he doesn't need it. If his recovery didn't blow he'd be pretty **** good.
Well, I'd say his forward air is the only thing that needs increase in knockback, it certainly isn't an easy move to hit with, or to combo into, it should be rewarded with more killing potential like in past games.
Wavedashing immediately brings on the stigma of Brawl+ being Melee 2.0
I found Wavedashing to be a very interesting technique in Melee that tended to balance the game by giving everyone more options. I don't think it is needed at all for Brawl+, my experiences show that it doesn't quite balance characters the same and it feels out of place. I can see why people are strictly against the idea of Wavedashing.
Ultimately, this thing will ideally wash over once a standardized codeset is made with some nice combo videos (highlighting all characters) to show it off. An FAQ for the added techniques and whatnot for the standardized codeset will also be needed (explaining Dash Dancing, Dash Canceling, No Autosweetspot, etc)