I see a metagame where matchup inexperience is a more powerful factor than ever before. With so many characters, naturally your mind is going to forgot about the irrelevant info. In this case,the low tiers. Now take Abadango's Mewtwo for example. He was amazing in Pound 2016 no doubt, but matchup inexperience (and a buttload of buffs but still matchup inexperience) played a huge role. No one really knew how to tackle this relatively mid/low tier prior. Now, since Mewtwo won, people are prepared and consider Mewtwo relavent info. I honestly think Aba will not get those kind of results again unless he switches to another underused wild card and trains like crazy by innovating their game (Mewtwo footstool disable for example, unheard of before).
Moving onto Zero vs Prince ramen, who the heck really plays normal Palutena besides AeroLink I think? Yeah, no one is going to know how to combat her and she is going to be one hell of a wildcard.
I think all players should secretly train a wildcard character. Really, make it someone who is relatively unused, then put lots of work into them. I mean lots. You have to make up for prominent character yet faults too. I think Zero for example, should do so with Shulk. If he masters him...no one will know how to fight back, until they process Shulk as relevant info.
So yeah, I think using unknown characters if you can make up for their faults and it fits your playstyle, is a more fantastic form of tactics in this game that should be utilised. We have 58 characters on the roster. Do some research, who have people never fought and know nothing off?
Which leaves us with the Miis. Now they can't be used online. Double edged sword. Harder to practice , but less people have experience against them. I mean, I've versed about 2 miis in my life, both swordsman. Yet to play a human brawler or gunner. And i would probably get wrecked for it. They would have the matchup knowledge on say, Mewtwo or Luigi but I would have none of them (granted I would use Mewtwo in this one for approach reasons vs a gunner, Luigi for Brawler)
I have heard things about default brawlers specials being the worst in the game, idk. And swordsman has a bad rep that i know nothing about but had Trela before...
Really, with this whole post...i think Mii gunner has the most hidden potential, played to the fullest extent of their projectile game. I look at them and see a fantastic ranged fair, uair, and f smash too. Perfect subjects for my matchup inexperience theory.