We may be confusing the terms 'leader' and 'go-to-guy'. In '99, Khalid was the leader, and, generally you want your point-guard to be. Your 'go-to-guy' is the one who is the first option for plays at crucial times, which, in '99 was Rip. In '04, Taliek was the leader, Ben Gordon was the go-to-guy. Last year was unique, in that Kemba was both. So far, on this team, I want Bazz to be the leader, and JL to be the go-to-guy.
In '99, Rip was a match-up nightmare for opponents ... he was too big for a guard to handle, and too quick for a forward to handle. And he was great at taking advantage: he'd catch-and-shoot over a guard, and blow by a forward. I believe Jeremy is similar, which is why, ultimately, he would be my choice as go-to-guy.
Note that that doesn't mean he's the one bringing the ball up. It means he's the one for whom the play is designed to get the ball. And, again, that doesn't mean that he has to be the one to take the shot ... just that I want him to be the first option, and the one I want making the decision.