It'd be bad idea to have an ex-MVP in his 35s still wanting to control the ball so that young players like Dirk and JJ could only blossom into dominant players after separation from him. If he was finally to concede to take the role Stockton accepted in his 35s, then it'd be considered.
Johnson is not a dominant player. He throws up one or two huge games a month, but otherwise he's the same player he was in Phoenix. Nowitzki is also more or less the same player if you look past his MVP season.
The argument that Nash holds his teammates back is bunk. And even if it were true, it's painfully obvious that the Suns don't have anyone ready to assume more of a leadership role.
I don't know how you can divine Nash's desire to control the ball. He's a point guard and it's his job to initiate the offense, and he's currently on a team where no one else can do that, so that's what he does. However, even on this team I have sometimes seen him playing off the ball as a SG, with Barbosa or Hill taking the PG duties. I don't remember a single instance of Nash griping about not playing enough minutes, not having the ball in his hands enough, or not getting enough shot attempts.
