Overall i think the weather system adopted by Rome is generally pretty good, especially the regional variations. What i miss however (mainly from Shogun) is the extreme heavy fog weather effects. I remember a battle where i only had one unit of warrior monks hidden in a treeline, while a whole army of Takeda troops marched around in circles looking for my single unit In the end they did find my small unit but alas, the timer ran out! Saved by the bell so to speak!

Ahhh those were the days.