As far as I know blitz requires vet 1 and is cancelled when the engine is damaged and smoke is doctrinal and costs 40 muni?!
It just sounds like you are mad because your opponents know how to use a Panther properly.
Cripple their engines and watch them die in a hail of 85mm shells.
Getting vet 1 is easy, furthermore if you're playing elite.
Damage engine with AT nades its hard if your oponent micro a bit the panther -which is the most easy tank to micro eitherway and also is good against inf-. Smoke totally avoids other blockins -guard rifles- and if you damage engine while blitz is enable it keeps running at superspeed (bug?).
I'm not saying is impossible to kill a panther, but is way much dificult to kill it than any other tank of soviets tank (wich are all harder to micro than any other axis tank) and you have to spend always more resources than axis did and rely on his mistakes (or luck) instead of your skill to destroy it.
The main problem is that with soviets tanks you need to focus micro and with german tanks its only attack move.