I think randomizing it would make it harder for our guild, which is the most powerful on the server, to gift other small guilds cities. There is one guild that can take one city from us on a bad night. There are a lot of small guilds though that don't stand a chance. We send one noob in to defend them and they get the city and the rewards for GW. We attack them with one noob and again they win and get the city and rewards. Randomizing would make that impossible and the small guilds would vanish like on other servers.