I wouldn't say that the "idea for the class" is the randomness of forms. Yes, it was designed and coded that way, but if it was changed, they would still be shapeshifters. The randomness is a way to assign forms. That's all. It does not define the class and if there's a better way that would benefit the game (and there is) it should be changed. Having said that, I realize that there is 0% chance it will happen.