I really believe all that needs to be done is remove crush ability. Maybe reduce range a tiny bit.
I definitely don't think it's as imba as is being suggested here. People need to learn to deal with it like they did with the Wehr AC in vCOH.
The biggest problem i see is its received accuracy. If it were able to be hit by things shooting at it , it would be counterable. But often(always) it dodges most AT gun shells then kills paks in 2 shots. Had a 2v2 yesterday where i had a 3 man gren squad, 2 paks and my teammate 1 pak. . They were all in targeting range of the t70 set up in a sort of triangle. The t70 came in head on 3 pak shots miss. I set up for a faust but the grens were dead before they shot. With 3 paks shooting at the t70, it manages to circle everyone of them killing all. It got hit once out of about 15 shots, the first pak, it circled it, killed it in one shot boom dead. Drove head on to pak 2 which had missed like 5 shots by this point and kills it in 2 shots. 3rd pak finally gets a hit after shooting at the t70 from the first time it appeared. The t70 takes that shot and laughs, drives head on then around the pak... 2 shots dead. It then proceeds to follow the retreating mgs and mortar squads to base and wipes them out before they get there..............
So how do you deal with something that was programmed to be immensely difficult to hit whilst it has 100 percent accuracy vs your low man squads?