the biggest effect partisans have is in 1941-42 in this game. When you are building your initial rail lines, a partisan hit can put an entire army group out of supply. I think that is why the modification to supply of partisans. You still have to do security to avoid the early hits, but it is entirely avoidable now. Once the rail lines are all laid out and converted, partisans really have little effect in slowing the Axis down in any way shape or form.
The thought of this part of the game looked good on paper, but worked out backwards to what should happen. That is why the entire re-design of rail line supply and how partisans affect movement of rolling stock. In War in the West, (from my understanding) rail line will have a supply and traffic capacity, and rail bombing and partisans will knock down that capacity level. It will be even more abstract, but that sounds quite a bit better to what should happen on the rails.
War in the East II will use that structure, and whatever modifications found to made from War in the West. I really can't wait for version 2 of this, as this is the best war game I have played. Love the level of logistics and operational control you get here. Not many games make the HOW to get there as important as WHAT is getting there.
Not fighting forward: Germans moving forward and not having significant combat for at least three turns in a row because the Soviets keep moving back faster than the Germans can keep up. Yes, there is time when moving back is important, but giving up massive amounts of real estate without bloodshed just wouldn't happen.