For those people who never played Halo2,there was a playlist called Clan Matches where there was 1.Minor - (basic 4v4) and 2.Major(Similar to big team battle,6v6 or 8v8 cant remember)
I basically grew up with halo and remember playing clan matches alot with mates,it was my special memory about Halo2 which i always remember when i think of it including super bounces 
How it worked:
Making a clan was fairly simple,when you used to press Y to view your friends list back on Halo2 you could just press right on your D-pad or analog stick to view the clans interface and click create a new clan there where various ranks with the rank Overlord being the highest needed to promote and there where other ranks which could kick.
Every rank could invite,inviting was as simple as sending someone a invite to game literally the same but invite the clan.
I think bringing back Clan Matches would be a great feature as it once was and make the game much better 
leave your views on what you think and vote:P
yes i posted this before but i didn’t know if i added a poll it’ll go to community so ill repost.