Fly wings, and other things of a bunch.

[Vhaerun]

If this means being able to use consumables while a cast time and/or a skill/sprite animation is active, then YES. There have been so many times I've died spamming a hotkey for an item because the game didn't recognize as much for this or whatever reason.

If however this means using consumables while a cast time and/or skill/sprite animation is active causes them to act as an artificial cast cancel(with the exception of fly/butterfly wings) by interupting with another skill casting item such as aloe vera, then NO. Being able to spam healing and other non skill items should be allowed. Items that cast skills shouldn't unless they're instant and wouldn't interupt whatever is already queued