Another route would be to make ram have less impact but also have less drawbacks, so ram + offmap won't necessarily mean a dead tank for both sides.
The Rus player sacs a tank and a ton of munis to kill one axis tank and you think that ram is a problem?
No, the problem is that it's too easy to immobilise an axis tank with ram and then finish with offmap.
But if you remove immobilise from ram it becomes useless.
As RUS, the problem with ram is that you sac a tank for 'a chance' to kill another tank.
It's best used to rush in and slam a werfer or walking stuka through a wall of AT guns, for example.
So why not forget about trying to immobilise and just give it a good AP damage buff and ensure the T34 is always destroyed by performing a ram? Remove the RNG from the scenario, if a player sacs a unit he wants to see a result.