I think there are a couple of things we have to keep in mind when it comes to Willie. One is that he certainly different. A seven footer that's a freak athlete. As a result of that, one has a tendency to expect more from him. Rightly or wrongly. Second, Willie came to the game of basketball late, which put him behind the curve somewhat from the get go. However, Calapari raved about how fast he picked up the game, for what that's worth. Third, he's only played six games of his second season in the NBA. The rule of thumb is that it takes three years for a big man to come up to speed. Sometimes a bit longer. So it may be a bit premature to start passing any long term judgement on Willie.
However, you make some good points in regards to the type of player or big man that Joerger likes for his system. Willie isn't a bruiser, and probably won't ever be one. At Kentucky he never shied away from contact, but he never won that many battles against bigger stronger players either, which is why Calapari used him as a rim runner for the most part. It could be that he doesn't fit what Joerger is trying to do. At least not in the present. So the question is, will he ever, or can he ever, fit into Joerger's system? If Joerger can't play him to his strengths, then there's no point of having him on the floor. Maybe they should send him to Reno with a boatload of protein drinks, a set of weights, and see what emerge's at the end of the year.
I like Willie and I wanted him here, but so far, it hasn't worked out the way I thought it would, for whatever reason. That said, I'd hate to give up on a player with his abilities so quickly. The player we see three years from may in no way resemble the player we see now. One of the problems the Kings have had over the years is that they give up on players, or they don't think they fit into the current system. Rule number one should be, don't draft young players and expect them to be your savior. It took an act of god to get Gerald Wallace into a game when Adelman was the coach, and Wallace turned out OK. We need to be patient, and lower our expectations. Them maybe we'll end up being surprised when a player like Richardson gets his chance to play, and he plays well.