As to flawed design: don't you guys feel it's a bit silly to create a character in rush down style game, whose main tool indicates that you will block a lot (aura)?
If UB Sub should make use of aura, and block a lot, he should either mitigate opponent's meter gain (by far!), or gain it himself double the speed when Aura is active (or both when EX is active). It makes no sense to make UB Sub rush down character, his dmg will always suck, and dmg is not what he should be about (there's enough hard hitting characters in the game). But if he is to play defensively, he cannot let his opponents to build breakers like there's no tomorrow, and that is what Aura does - it helps rush-down now more then Sub himself.