Hey i think that guild controlled cities are a great idea, though we will need some kind of limitations. Firstly having a town will cost a great amount of money so that small guilds will not be able to afford it. Secondly devs should prepare some spots for building a city, so that it cant be built just anywhere. This will remove the problem of having cities 5 metres from each other. Last but not least, all the city buildings must have an impact on gameplay. Capturing towns should be possible, but it have to be very difficult to do it, defenders must know about upcoming attack before it happens, so that they can prepare themselves.