Pack howitzer needs its price lowered. It's the only early game indirect fire USF has, and you have to pay 380 manpower for it, 40 more than ISG and OKW never manpower bleeds.
10 fuel max. Why would would you put it close to the price of a mortar halftrack. The mortar halftrack is mobile and can shoot incendiary shells, that's why it costs how much it does.
What I don't understand is why it has the same penetration as the SU-85, at the same time as being a lot quicker and can use a barrage ability for free. I mainly play Soviets, and the SU-85 seems really pointless when you can just get multiple SU-76s.