Clan war tournament suggestion
The matchmaking shouldnt be just set on clan lvl. A clan lvl 5 could be full Th10s facing any clan lvl 5 with mixed townhalls? Wouldn't be fair at all.
my suggestion is for a more "locked in" tournament. Here's how i would approach it.
Weekly/monthly tournaments in which a clan selects its players. ( a clan of 30 ppl can select to LOCK IN 25 of its players.).
Once locked in the players cant be subbed in or out. This would benefit the more active and established.
The the reason i say locked in is because i think it would be easier for the matchmaking system to arrange similar clans that have their players "locked in) for instance the matchmaking system can find 4 similar clans with their players locked in and place them into a "league". These clans will fight each other 1 at a time. The winner would be decided between the best win/loss record. The winner of the league would get a hefty war loot bonus or some type of customizable emblem to represent their clan tournament record/lvl.
The tournaments can be optional and those clans who still want to war can just opt out of the tournament search and fight clans in the current clan war system.