Ostheer are meant and do have more cost efficient support weapons so it does make perfect sense.
But the only support weapon that is more cost efficient is the MG42. The Soviet mortar might perform a tiny bit worse but has better durability and flare which is a great ability. The ZIS is straight up the most efficient support unit in the game as it can perform AT and mortar duties along with great durability.
Personally, this is why I believe maxim will stay “bad”. If it were any better, even with a slow start a T2 rush would become unbeatable due to attrition and staying power from merge.

Danke_Tovarishch
rumartinez89
보드카 중대
Heartless Jäger