Aaron does one of the four things you want from a point guard. The four qualities being offensive and defensive abilities, decision making and leadership. Obviously Aaron can score but he hasn't develop any of the other 3, which is why the Rockets haven't given him an extension because there are still questions around him and they want to see what he can do as 'the man' at point guard on a championship caliber team for a full season. Honestly Brooks shouldn't have even expected an extension with the way he's played.