Actually it doesnt. If the okw had similar fuel income as the other factions it would be a different matter. but the fact is that the okw in most 1vs 1 games can only afford 1 panther or jp4 or 2 puma's . These guys potent as they are will fall apart fuel wise when dealing with the very cost effective call in tanks in the form of the 85 and e8. to properly balance this the okw needs shreks to support their AT tanks.
Your suggestion will not open up anything just unnecessarily gimp the okw. in my opinion the current handheld safe for the zooka who needs a slight price decrease is fine
Then buff the ratkenwerfer to something resembling a Pak. The lack of fuel income does very little to stop the massive blob of super effective infantry that can hard counter any US armor.
Barring the IS-2, or ISU-152, you only really need one panther because obers completely nullify any and all infantry, and the 2-3 5 star volks squad can obliterate any allied armor.
Its not some magical coincidence that it takes me 20 min to find a game as a German in 4 v 4 vs 30 seconds as the allies. No one wants to play anything larger than a 2 v 2 as the allies, and with good fucking reason. The heavy armor is NOT balanced at all. Of course Germans are all for making the bazookas cheaper, a useless AT weapon is still useless even if it costs less.
The new instant squad wipe mechanics have only made the problem of closing with armor even worse. But hey Germans can always just keep cheering "flank" and "combined arms" so the game stays like it is.