I haven't played HOI 3 for that long, but one thing I found lacking is the effectiveness of UR. IMO, UR could really be a game changing feature. Right now there are three different things UR could do. The first is "Do nothing and gather strength." The second thing is "Spawn Partisans" once the UR cell has gathered more strength. The third activity is "Spread into nearby territories." I think, and it's entirely my own opinion, that this mechanic of the game could have more effect than it does now.
In my South Africa game I was spamming UR cells in southern and southwestern France. I also had a few cells in northern France, the Netherlands, and Greece. I had also spawned one in Tunis and when partisan units were formed they were damned lucky that the Italians didn't wipe them out and that the British were able to land troops in Tunisia and capture Libya and recapture Egypt.
For the Tunis partisans it was luck that they succeeded, but in France and the Netherlands such tactics would fail almost immediately. So, I think that the UR mechanic should be given more abilities, so to speak. Examples including sabotaging infrastructure, lowering the resources that provinces provide to their conqueror, and sabotaging airfields, ports, etc.
Does anyone think that this would be a good idea?