We absolutely need to be able to toggle visibility of as many action bars as we want, and to be able to rebind action bar keys to non-1 through 0 keys with the ability to use modifiers if desired.

Ideally I would have all 3 action bars onscreen, scaled to about 60-75% of their current size without modifying the size of other onscreen elements, with actions bound to Q, E, R, F, Z, X, C, V, 1-6, and Shift and Ctrl modifiers.