My game has similarly been slow. I've only had one real misbalance to report, I've been using the "cha as strength checks to burst objects / move objects requiring a str check" sort of thing, and +2 per hand is, well, a lot. At level 4 I've been easily getting +19 or so on strength checks. Together with shatter at next level, I've noticed that this class is phenomenally skilled at just destroying objects on whim.