well, i was thinking about the hp bar on the top-left corner of the screen. That bar, when you got too much hp, doesn't show you all the hp you got, and the game could look a little bit more neat if the bar shows all health.
and for little aditions the bar could get, for example, green if you get poisoned or red when on fire, etc.
also, move the materials messages out of the chat box, it's kind of annoying all that spam.
There's already the main bar at the bottom of your screen.
The other bars are too see if you allies are in critical condition or to kick them :P