Everything about 5a describes my current skill level. I used to think I was a 5a when I was level 4 because I could destroy level 4's and under with ease and pull off a lot of advanced techniques.
Now, I'm not only trying to learn how to play every character, I'm mastering many different combos, confusing mindgame tactics, super obscure advanced techs, and DI
I'd put MATTS! at level 4, he knows what to do to win, but has no desire to increase his combo and mindgame ability. He goes into every match with the same strategy which, sadly, can beat at least 75% of the smash 64 population. (this includes casuals aswell as competitive) And he's happy with that, but as far as I know MATTS! never attempted to broaden his character choice, or his playstyle, therefore he'll be at level 4 until he stopps trolling.
I've played MATTS his mindgames and his mental game aren't highly underdeveloped, he has the potential to cross into 5a easily, but his mentality towards this game is trollish and immature so I doubt he will. Prove me wrong MATTS!
MATTS COMBO!11!!11!!!
P.S In my opinion most level 4 players do not DI at all, and some may not even know how to do so. DI sepperates level 4's from level 5's and beyond easily. Id consider my offensive game level 5a, but my DI is still that of an advanced level 4 player.