T70 can carry the whole faction.
If you're playing against a retarded ape.
The very first thing decent players do nowadays when playing against sov is rush t1 and pump out 2 atgs. Just one contact with the enemy and t70 is a burning pile of metal. It's even better with OKW since they have t0 ATG.
My point being: sure, T70 is a deadly tank for its price, but it has become so commonplace it lost its edge by the sheer number of players using it.