Yeah L2 + R2 should bring up another crossbar.

I don't think there's any way to have enough buttons with instant accessibility without adding this option.

You just miss out on too much usable stuff when compared to using a KB/M. Despite the fact that the game plays fantastic with a gamepad.

I don't see any reason why they wouldn't do this. It's so much faster than the r1 switching, which tacks on about an additional second no matter which way you do it (tap it or hold w/ another button).