There are a few wars that are really close or could have gone a different way if one thing had/hadn't happened.
Suggestion: Add an option to ASK the opposing clan for a rematch after the war is over
Edit:
1) You should only be able to rematch only once against the same clan as rematching again and again could lead to serious misuse.
2) The system of rematch would be the same as the one of finding a clan to war with. Except in this case the opponent would already be decided. This means that the number of players which participated in the war before would participate in this match. In a case where the previous number of members are not available, the leaders would get an option to call off the war or war with less people.
3) A clan war preview in which the leader can see the opposing players which are participating in the war. If he sees the war to be a fair one he would accept. This option, of course, would be available to the leader of both sides.
4) If the opposing clan declines the war rematch, the clan that sent the request would not be able to send the request to the same clan to avoid annoyance.
More suggestions for the betterment of the idea are wholeheartedly appreciated. :)

