I know that with specific addons and key bindings I can select a specific item placed on the quick slot wheel. But still it is pretty awkward to do while I'd prefer such things to be on the mouse wheel. I know that this is usually bound to the zoom and it makes sense to have the mouse wheel control the zoom.

However with pressing a key (eg ctrl) while turning the mouse wheel could then control the quick slot wheel that we have bound to the mouse wheel.

It would work much more like the weapon selection in many ego shooters and simplify things in combat when you want to use various potions in different situations.