What would be good is if you & the enemy could capture each others immobilised afv's that end up in their territory - they could then be placed into an empty slot in an armoured formation and assigned any spare crew from that formation. After it was repaired the captured AFV could then be used with new markings.
I'd love that!
So long as the starting location of the unit is still under your command and the unit is not destroyed your damaged stuff is still in pool. Just figure some recovery units showed up and towed your banged up armor away.
It was actualy the enemy tanks who were left in my territory, and were ready for the next battle.