The more detailed game is the more alogical it is. Let's imagine there is good system of seasons. So I get great attrition when I move army during winter, right? When does the winter starts - it's important cause I just can capture a province and mantain a status quo during winter. Is it on determined date? If no, can I forsee when it starts? (it would be stupid if I couldn't)? Does it come at full force (from today you lose 15% of your army monthly)? And the most essential: could it be effectively used in gameplay? I can't imagine a way to make it good without adding some hell to micromanagement. If you do, say it - and I hope we'll get a better game.