Here are some more ideas that I personally find would be an epic addition to clash.
First off is an addition to the new ranking stuff in new update, why not have a bar come up when a leader clicks promote a player were you can type in the name of the clashers status in the clan. And basically the leader can come up with and name they want for the clan mate and that is what person status would be updated to.
For my second idea is an addition that should solve un active players. So basically the clan leader is able to buy more spaces for their clan with gems. Obviously you're not gonna want people like gemmers to gem to a ridiculous amount of spaces for their clan making it hard for the other people to start new clans. So if added you'd just want to start with doubling the current amount. For example: 5 spaces 100 gems
And this last idea is kind of based on the trust of clan people to their leaders but clan members are able to donate gems to their leaders.