A clan with 50 warriors is too dificult to organize, so to make it easly people may made clan wars with 15 of the 50, what about make 2 wars at the same time? For the others 35. The 15 in the first war will can not be in the second war, because it is at the same time as the first war. (Sorry, I speak in spanish) with 2 wars at the same time, people should be more active, more cooperative with the other people (I think)
That is all
However, what you would really like is sister clans functionality. Designated sister clans would mean facilitated movement between sister clans, separate chat and combined chat, and individual sub-clans war independently.