Good idea, but I think a shoulder button is better for *playcalling.
The reason...
You keep movement control of your player. You can keep him out of trouble while you're selecting a play
With the D-Pad you lose that control for a moment and that could be disastrous against aggressive D. It would also break the flow a bit.
D-pad isn't a bad place for play calling, but I think shoulder buttons are better.
