Conflicting characters are what make a story interesting. If everyone was bland and clichéd, I probably would want nothing to do with the BlazBlue story. It just so happens, that there are character conflicts, both morally and physically. Which is is why I do enjoy the story as much as I do. Now, I personally am very fond of the characters that are designated as 'evil' in stories. They tend to be some of my favorites, and I always find myself hoping they win (usually.) Albeit, this may be biased, but I'm hoping for some type of ending in any future installments where 'Team Troll' wins. Whether it be just an alternate ending, or a canonically correct one. I think that would just be BA in itself. Considering how dark CS was story wise, it doesn't seem like too much of a stretch either.
When it comes to the cleavage duo that was added to Team Troll, I'm not sure I can see them being redeemed. Looking at Litchi, she seemed so desperate in her love, trying to save Arakune and Hazama did his thing and preyed on that. Now it's possible that she can be saved, possibly having Bang do so, but whether she wants to be saved is another story. Likewise, if she finds out they have no intention of helping her out, she might try to go AWOL, in which I can only foresee Hazama & friends killing her on the spot.
Now, as much as I love Tsubaki, probably one of my top characters, her situation is even worse. I say this because it seems to be that she is more under mind control, probably from Phantom. Of course, she harbored jealousy and etc. before, and Izayoi (or w/e) wasn't helping either, but even then she was hesitant about fighting Jin or Noel, and could not bring herself to kill them. However, it wasn't until Phantom and Hazama showed up, and her inexplicable costume change that she was ready and willing to kill them. I mean, if she isn't being possessed/mind control, then what's the point of the visual aid? Why didn't Litchi get one (I don't think she had one, :P)? Thats just how I see it, anyway.