Wait what. Broken / no unified system?
Well by Unified System is that each character plays really different, for example Touka who is the Samurai Girl can dash cancel out of most of her specials. Riannon Super meter autofills slowly with no need to activate anything. One of the small little girls is has short hops, like KOF, etc etc. Each character has their own special ability that none other has, so each one feels like they are from different games. BlazBlue is a bit similar in this aspect, but not to the extreme of Aquapazza.
Regarding the game been broken, well is just that most of the videos I have seen have a lot of Riannon, who is the long distance character and she basically can just play defensive and from far. Of course, I have seen her lose but the ratio should be like 1/10 matches she loses. But of course, the game can be patched because it's in Nesica board, so I'm not that worried about that.