One of my pet peeves is just when people say that a character is "Useless" competitively.
True, while their are some characters who have it a little easier with system mechanics, most of the time it's going to take in account whose the better player in terms of skill.
Since I usually play Makoto, or in P4A's case, Naoto. I have to deal with quite a bit of this...
For starters, while Makoto has the shortest range in BlazBlue, as of CP, her damage output is the most consistent CP, and she actually has one of the most practical okizeme in the game when in the corner, and her pressure is riffled with nasty frame traps and some mix ups that can be hard to read. Lastly, her defensive options are rather decent when compared to other characters, having a DP, A Parry, and a strong Back Dash and fast jab.
What ever you do, please don't call a character useless, or Unviable, simply based on their placement in tiers. Their all useful and dangerous in the right hands.