No. The last thing we need is zombie tanks.
Nobody in the world wants to spend all their medium tanks in losses having to chase down the absurdity that is a Tiger Ace / KT / Jagdtiger into the back of the enemy base only for all of them to be handed back free to the enemy team. Good luck clearing out the wrecks from there.
Nope, no, nada.
Remember that things like pop cap still apply, and wrecks as they are now are easily destroyed, especially in a clusterfuck situation that you are describing.
Besides, you'd be playing VP, not annihilation, no one is forcing you to chase anything back into it's base and if you do, there'd be that risk. I see no issue.
And on top of that this recovery vehicle would be tied to a commander...so that player would have no access to a heavy tank at all, assuming it wouldn't be an OKW commander.