No question the most important acquisition for the Heat is NOT Walker or Posey, but Williams.
They are going to hand the offense over to Jason to run. He can be great, or he can be a huge mistake, but at some point Williams is going to aggrevate either his own team or the team they are playing at the time.
It should be very interesting to see how guys like Walker and Shaq handle his entry passes. Shaq, for one, has never had a point guard quite like Williams before. The ball is going to appear near his hands at times like magic and while he has above average hands for a guy his size, Jason has not always had teammates who ever got used to that.
Most of Williams passing history, which started with the Kings, resulted in his teammates often not even looking for the ball to come whizzing their way, resulting in terrible looking turnovers. He has gotten away from that, it seems, during his time in Memphis, but with a new team, that may be a factor early on.
I always thought that Jason's bad rep was overstated. Doug Christie, who also would run the offense back then, looked much, much worse to me when he tried to be fancy in passing the ball. Most of Jason's passes were on the money, but so unexpected they would sail pass their intended recipient.