Idea: Leave/kicked from war penalty
How many times have you had someone in war that flagrantly blew their attacks, didn't follow a clans strategy or deliberating did something just to get the loot then leaves in hopes that your clan wins.
Well, it would be nice if a user left or were kicked before war ends if they were penalized. Maybe they only get a similar percentage to if the clan lost the war. And if they did lose, an even smaller percentage. This would give more incentive to finishing a war, rather then sabotaging a war for your own benefit, or clan hopping between wars. If your not there when the war ends, your loot winnings are penalized.
We like to give new people a shot in our wars, maybe they become regulars and stay in the clan. Or maybe they won't, but at least it gives the clan some control over whether the person(s) reap the benefits or not of a clans winnings.