Do you mean that it's s still a ram against an enemy with damage/crits or just a different overdrive?
If it's a proper ram, I'm against hiding it against vet1. If it's more constistent and usable, it might be a good use for fresh throw-away T34.
The ability would provide a straight line acceleration boost using the current mechanics but being skilled shot instead of aimed, if the unit collided on an enemy vehicle it would ram it.
Being available on freshly built T-34 i part of problem of balancing the ability (I really do not see the consistency in being vet 0) while the cap territory is not suited for the unit. By making a vet 1 ability and making scale with veterancy one has more tools to better balance the ability.