I don't get why didn't just revert the OKW changes back to 66% resources if they are gonna increase the fuel prices of certain tanks.Then they would have to put down the fuel cost for the vehicles that did not need a nerf (e.g. Flak HT). It does not matter whether you put up the cost and keep the income the same or whether you lower the income and keep the cost. In the end the effect is the same.
Clearly the issue here was resources, not the individual tanks themselves. Wasn't that obvious?
Further it´s easier to balance the game if everybody is at 100% resource income.