Weather

It would be cool if the weather changed for example, one day it's raining/hail the next is sunny, then overcast etc...

Youre talking about attacking in the rain and hail and I'm over here struggling to attack on a clear day lol

That is kinda true if they did add weather to coc I bet they would have to add in stuff that slows troops since weather would normally affect a real person or troop while attacking.