On our server we hold 8 cities one day and drop down to 6 or 7 the coming day and we know we have competition again the next day which we were missing for ages before the server merges. I Would like to make a small suggestion which most have already mentioned , the Durability loss of 5 is high even after a win. More rewards based on the cities that we hold / is it general rewards raise. Any thing that you do to fix the imbalance shouldn't create more imbalance.