Visible HUD numbers (Toggleable)
(Pardon my crude MSPaint edit)
This game is often described as being MMO-like. Many MMOs have stats such as your health stamina and mana/abilities visible on screen as an exact number.
This suggestion is for the ability to toggle exact numbers for your vital stats on or off, perhaps even making them pulse when a particular stat is low or flash when critical for extra flair.
This could aditionally help with making testing easier as well, as you can see exact number changes at a glance.