The ideia is to have another sprite overlaying the health one, creating a ring of armor. I think that would be very nice, since commander can coordinate a better HA attack, indicating a player to welder other, based on the armor info.
Also, he can know wich weapon a player have, how many ammo he got and if got welders/grenades.
The attached image is really old (It was from one of 2.1 betas), but I think that is no problem to attach it now... The image with the HA Model and the Rings, created by Schimmel, got lost in the Vet forums, but I'll try to make something when I have a little time
Note: The green ring is the health one, the blue ring is the suggested to be added and the (!!!) would be the icons for the weapons, representation how many ammo the player got for them
Would be even better if we could sum with the icons in the player hud idea...
Edit: Clarified the "Note"