I understand that, some time ago, there was no health bar above mobs heads (when hovering the mouse over them). So adding the health bar was a really nice improvement.
I would like to request this feature: write the mob hp in numbers on top of the health bar above their heads. Many times I would like to know how much is the current hp and the maximum hp of certain mobs.
Also it would be nice to have a hotkey toggle for displaying the health bars above all mobs on the screen.