haven't been in alpha. tell more, just out of curiosity
Here's what I remember.
OKW trucks came out on a timer, much like launch OKW. The difference though was that you could have all 3 trucks in their unset state just chilling around. The trucks were a supply chain system, points they were sitting on gave you 50% instead of 33% resources, but it was a pain in the ass because you needed resources to set the trucks, but needed trucks set to get resources.
Original structure of their tiers, which I don't remember 100% and hope someone else can correct:
T1 Flak Cannon: Was super nerfed when I started playing the Alpha. Had Panther, ISG, Luchs, IR I think.
T2 was Medic Truck. I think it contained the Flaktrak, Puma and Stuka. The retreat upgrade also used to cost fuel and less MP, but was changed due to the need for any and all fuel into the war machine.
T3 was the Mech truck. Obers, KT, Sturmtiger. It also, when I started, had an ability to directly convert your stockpile of Fuel or Muni back and forth in set values rather then as an over-time thing like at launch.
I have no idea where the JP4 was.
Strategy back then with OKW was generally infantry blob into rushed KT. The problem was, no other vehicle in their fleet was worth investing in, so it was pretty boring, despite having a lot more risk/reward payoffs.