That’s the thing though, going without a helmet into combat is just about the worst mistake you can make. Not having a helmet is something for movies, as you’d just die without one in a fight.
Toggling them on and off would also conflict with the idea of everything that you see on the map actually being there and would remove an important visual short-hand for what state your merc is in.
However, If you need help identifying your merc, how about having a portrait of the unit’s head in the command UI on the bottom, in addition to the name? It would need to be unobtrusive, so I don’t have a mental image of how you’d make it work without conflicting with the design, but it’s something that the future UI programmer might be able to pull off.
