Three things I always wished the game had.
1 is the ability to demolish a castle you own. After mass attacks I don't really want to keep a castle on the other side of the map. I would rather just destroy it so the alliance I took it from can't have it. Of course you would need some controls on this (can't destroy a castle that is under attack, etc.)
2 Ability to delete select spy reports and other reports without having to click on them and delete individually.
3 Access to browser version via iPhone and iPad. Sometimes I want to use browser version instead of. the app.