Wishlist: Shift-wheel in 3D should tumble Z, not X

As is, we can tumble the perspective view in X and Y with Alt-MMB dragging in X or Y. Fusion 8 added Shift-wheel for tumbling in X. But I think it would make more sense to tumble in Z, since there's no other way to do that.

Though is seems odd that it's Shift-wheel, not Alt-wheel anyway...