I didnt say its too powerful.
Gettign rocket artillery in 1v1s is a gamble. you get those, you come short on other vehicles like tanks etc.
It comes late, it is expensive. Getting one (and later on losing it) can lose you the game.
Make it easier accessable and its just like in teamgames where you get whatever you want and get away with it.
Just stop. play teamgames if you want Durchbruchmüller to shine
