Basically, avoiding starvation as a nation like Germany is waaaaaay too easy, and the consequence of having a food shortage are far, far too mild. Just go for war rationing and buy from Romania, and you never have to worry about food again.

The Soviets get insanely buffed with how much grain they have, making them absolute monsters from all the factories they get from selling it.

IMO, food should be a lot cheaper, but shortages should also be much more punishing, and rationing should also be more granular, i.e. with more tiers in between "no rationing" "some rationing" and "insane rationing" with penalties associated with it, as workers are less productive when they don't have enough to eat.

Like I said, the idea of the mod is great, but I find that I actually don't really have to care about food once I've taken a few minimal precautions, and as the USSR you get drastically overpowered from selling food.