I think it would be cool to be able to scroll through the items in a dropdown menu with the mouse wheel (such as which animation to use for a static mesh in Blueprint viewport). Or some other controls at least, since mouse wheel is already bound to scroll the panel, maybe Tab to cycle or something.
Yeah, there seems to be a de-facto standard for mouse wheels just scrolling windows and panes which seems like a waste.
I built mouse wheel support into an app I wrote for drop downs and numeric boxes (combinations of wheel plus shift/alt/ctrl) and it works incredibly well - I miss being able to quickly select the exact value I needed.
I’ve looked into if I could write a plugin to do it, but it looks like it would have to be done in the main UE source code - probably not a feature worth creating a new fork for on github…