It's a good idea (and real) to be implemented.
No soldier is hit and continues fighting as Rambo does.
A wounded soldier would have less AP, carry less weight so he would have to throw heavy equipment, less accuracy, panic...
I think the extent of the wounds should affect those stats depending of the type of the wound: burning, being shots by laser or hand to hand.
I assume there must be a balance between realism and playability. I only ask wounds system doesn't get too simple.
I haven't played enough to know what "supression" actually means but first glance, it sounds good.