Pretty common feature in many eastern FPS games and some COD games, clan and guild system is a great way to encourage people to form a small community and enjoy the game together.

Considering solo queuing is hard and not that fun, and even in quick match it is simply more fun to play with friends, I believe this feature is long over due and something that will only positively influence the game with almost no negative results from it.

Simple features such as Clan chat, roster, announcement, clan tags etc. should be available from launch, and potential rewards (% xp or reknown boost or alpha pack for playing together etc) or competitions (monthly or seasonal rank of clan matches, cumulative or within duration) should be considered too.