I think the stats should be 12vs infantry 1 or 2 vs light armor and 0 against the rest?
well dude... theres a big difference between a armoured car and a Wirbelwind or Ostwind etc... The t90 does a "Armoured Car" role.Your pretty much saying that a Armoured car needs to be as deadly as an wirbelwind. makes no sense it would ruin the balance, remember how early the unit comes.
its just not worth the investment late game or early game