CLAN WAR: Comment on Bases.
I have seen recommendations to mark bases for attack and also to send private messages to clan members. This would solve both issues by also adding another helpful clan tool.
My idea is to essentially have a comment section for each base in war...for possibly home bases as well as enemy ones! This will allow each clan to see their own comments, which can be used to call attacks. Provide helpful strategy remarks, etc. For Home bases, you could make suggested improvements..etc.
This will also help in communication as usual messages are lost after a couple of hours where these can stay for duration of war. So, you can: Scout Base, View Comments, etc.