I think Jackson and Staby are right, make the next ones as brilliantly innovative as you can. If that means redesigning parts of the mesh or cutting it differently, as opposed to just tweeking joint parameters, why not? I'm satisfied for now with the P5 and Millennium characters, but they're not perfect - especially for animation, where post-work clean up of joint folds, etc. is impractical. I'll be easily tempted to buy others that are true advances, not just more of the same.