Their are 3 minor issues that need to be resolved before the okw becomes viable in 1vs1.
the first and foremost issue is the panther. its supposed to be the main AT heavy tank but its very under powered for what it is doing. its very difficult to hold back soviet or American medium armor spam in 1vs1
2. call ins need to be tied to tiers. okw doesnt have any good call ins that allows it hoard massive amount of fuels and then deploy 4 85's or e8's it needs to tech and use fuel and mp giving the allies an advantage.
3. and the a minor issue but still important is that volks are currently the worst starting infantry in the game. having non of the abilities of the scripts or the raw dps of the grens volks simply do not scale well unless you reach vet 4 or 5 where they finally become viable. but units should be viable from the start and not wiat until vet.
I think only #2 is actually an issue.
The OKW panther performs fine against Soviet/USF medium stock tanks. It only starts to fail when you put it up against superior numbers of EZ8 and T34/85, which can be massed due to no teching cost.
OKW has plenty of infantry with very high anti-infantry DPS. Volks also scale a lot better than conscripts with nice veterancy bonus, a AT weapon upgrade, and grenades that don't require an upgrade. They also have a doctrinal ability that gives them assault grenades for only 10 ammo. I don't see the need to make volks even better. Adjusting the Kubelwagen is a much better route to take for improving the OKW early game.