My *minor* changes would place the HPs and Mana in there. Not an x/y - rather just the x. That's what I would suggest.
I want to clarify my former statement. I hate mods that put that information over the bars themselves. I can tell at a glance how much health I have WITHOUT them there, so I'd like them off to the side. But having X/Y on the side is too long and distracting. However, a single number set of up to 4 characters (I'm unaware if anyone is at 10k HPs yet), would be a nice feature. And some different color from white would also be nice. Yellow perhaps.
Now one *could* have the color of the numbers change as health or mana gets low, but I would think this would be unnecessary and bloating the mod.