It's just user interface pain in the ass, so I got rid of it.
Battle camera restrictions make giving orders to your units in battle much harder, especially when the battle gets bigger or you get some reinforcements. You already know map of Europe, and turning off FOW doesn't reveal enemy units or buildings, so you still need some spies to learn that. I don't think it affects difficulty at all, it mostly makes interface nicer. In a way of full disclosure I play with fog of war turned off ( ~ toggle_fow), Follow AI movement turned off (in menu when you start), and battle camera movement restriction turned off ( ~ toggle_restrictcam). It's quite likely that on higher difficulty the strategy I'm proposing doesn't work any more, so you should listen to them instead of me. I'm not sure why but all strategy guides I've seen on the Internet suggest gameplay very different from how I've been playing.
