That would completely destroy saving the crew. If they lose their tank or get it stolen they would become giant burdens on the player. That would maker a bigger problem then the one it fixes.
it could, if done poorly. i suspect with the merging of frontowiki or w.e squads in sp, there could be a way of tying a crew as an entity to the last vehicle it was in.
i agree, it would stink losing 2 m36's and having 2 homeless vet 3 crews for instance. i wonder if it would even be possible to be in a situation where you could no longer call in any armor and were stuck with too many crews, y'know barring being the sort of respectable commander who doesn't just throw their troops to their demise into a blob vacuum.