Not exactly.
L2 is always the post button, no matter if you choose Default, Dribble Moves, or Shots in the Controller Settings Screen.
So when you switch to Pro Stick Shots, you have no access to the dribble (ISO motion) anymore.
But if you switch to Pro Stick Dribble, your shot variety is limited and you're stuck with the button shots (which means using the left stick to kind of modify the type of shots u take).
But there's no more "Pro Stick setting uses shots or iso; L2 modifies the pro stick" setting.