I still think that it should be added to multiplayer. Simply not in the same way it is in CoH2.
Make it trigger under certain circumstances but then make it trigger 100% of the time and also give the captured tank slightly worse stats and maybe also make it cost like 10 or 20 fuel (+ammo?) to "refuel" the tank
I think the consistency idea is good, as well as the "refuel" idea (for some reason I thought I remembered this being a thing in CoH1, even though there were no vehicle abandons then. Must be going crazy.)
I disagree with the having lower stats part, but I like the spirit. I think it would make sense for the crew to have trouble in the vehicle, because they're not familiar with it.
What about if it started out with "negative" veterancy? Like the crew has to get familiar with the vehicle first so maybe it has a slower reload and worse accuracy until it's gotten a tank kill or two under its belt?