Overall a pretty decent. Couple of thoughts:
The double whammy of paid truck upgrades AND weapon unlocks might be a bit excessive for OKW even with vehicle prices brought back in line. It really depends on how much each truck upgrade would be and how well OKW can do without relying upon those upgrades while rushing armor. My gut feeling is that in it's current state OKW probably doesn't actually need to rely on any truck upgrades (med/repair/flak) prior to producing it's first medium tank in 1v1 though.
Additional Jackson survivability might be a bit of a problem given how effective the M10 became once it received that extra 160 hp. The Jackson already survives two panther shots, just not three. If you meant the M8 Scott though I agree, that vehicle needs at least 400hp as it is currently far to fragile for when it arrives and what it does.
Another area that really needs looking at is soviet T1. Soviets are currently balanced in 1v1 games but as has been mentioned T1 is currently dead outside of producing M3s to hunt Kubels. For the sake of variety T1 needs some improvements to Penals (better mid/long range damage profile) and Snipers (one 82 health model) to make it a strategically viable option again.
Going off of the sniper health change a Aim time change would also be a welcome change.
M3 scott needs a lot of love for sure, AOE needs to be increased for sure as well as giving it direct fire as well.
Would also like to see the IS-2 range be brought in line with the Tigers starting range. JagTiger range should be reduced to 80 so it wont be a hard counter to the 17pndr as well.