The system argument is a valid one, but I would argue that it is more important to structure a system around strengths and weaknesses of your players or at least I believe that is what a good coach can do. As an organization your front office and your coach have to be on the same page. You can have the best system but if you dont' have the right players that fit into that system then it is worthless. You can have the best players but if you don't have the right system then your players are worthless. This is why I am for keeping miller. We've had a vision believe it or not and that is a half court offense that has a strong inside presence, outside shooting, and a point gaurd that can penetrate. Miller is the pg, person is the outside shooting, and Z when healthy is that inside presence (Diop who'm I like, is our presence of the future and we MUST stick with him). This is the same formula the lakers have used. The Front Office's job is to bring in the best players and the coaches job is to implement the best system to accomodate those players.
As for Hughes in my opinion his problem is that he's never really found a true position in the NBA. They tried him at the shooting gaurd position and for whatever reason things really never worked out. In Golden State the brought him in and tried to convert him to a point gaurd and that didn't work. There is no doubt that Hughes is a tallent, but whether he will find a system and a position to fit his needs is a question that has yet to be answered. My feelings are that we've had enough question marks on this team in the past few years we don't need another.
That is my feeling on hughes. Sorry for the long post.