Ability to opt in or opt out of clan wars while remaining in clan.
One of the biggest drawbacks of the clan war feature is that it causes a lot of fallout among clans. I can't tell you how many solid clans have ended up falling apart due to non-participation in wars, failed attacks in wars, failed wars, etc. This has led to a continual process of people leaving, leaving early, being kicked, etc. So it seems to me an easy fix would be to simply add a toggle switch in the player's own profile (or somewhere else that's relevant) which would allow a player to opt-in or -out of clan wars without having to leave his beloved clan. This would keep friendly familial ties in tact and allow clan members who WANT to war the option of warring with their like minded clan mates, while others can sit it out without having to leave the clan or be kicked, etc. Seems like it would prevent a lot of drama and unnecessary clan erosion. My clan for example usually runs around 40-50/50 but there are usually only 30-35 who are committed to warring. Without fail, many do not use their attacks and we lose. As a result, we've had to kick several members - some of whom had previously been close friends. Moreover, not everyone agrees on the frequency at which you should go to war - so having an opt in or out feature would allow you to engage or disengage at your own leisure.
Another idea in tandem with this would be that the LEADER could have an override and opt players out of the war before launching so as not to have to kick, etc. All of this gives more control over the war feature/function and would restore peace and happiness among clan families everywhere! I sincerely hope to see this feature added soon. Thanks for your consideration!