So in your opinion, any character in Injustice should be able to make top 8 without any issues and even if the brackets are full of lopsided match-ups against them, it's actually the players' own fault for not being able to overcome 3-7 or 4-6 match-ups every single time?Anyone who doesn't know what you mean by the "right bracket" shouldn't be on this site. You flat-out state that a "NON-TOP TIER character loyalist" cannot win a tournament at all and can even just barely make top 8 ONLY if the bracket is full of the few favourable matchups for said non-top tier character. I only used 16bit as an example as he's the most recent top placer with what is arguably a bottom-tier character. Just like your other statement about MK would lead one to believe that you think that MK isn't a much more heavily MU-based game than Injustice is.
LBSH, even top tier characters can have the "wrong brackets" for them. The difference is that it's a much harder thing to pull off and the player is much more likely to overcome the bad matchups and win.
If that's your belief, I can't do much to dissuade you other than to say that 16bit is the only successful Catwoman on the scene and for good reason - his pedigree of skill and excellent training partners and scene to compensate the numerous bad match-ups Catwoman faces. Others with less patience and scene will opt to pick easier characters to use.
And in terms of MK being a MU heavy game - only for the top...what is it? 4-6 characters in the game? Anything less than that aren't even included in match-up charts. So if you say MK is a heavy MU based game, well, I can only laugh at that ridiculous notion. Might as well say UMVC3 is a heavy MU based game too.