I know these have been brought up before but revamping vacation mode would be super helpful. Its crazy that people can sit in vacation mode for what seems like forever. This harms active players.
Also, the ability to filter search options when looking for nations to raid would also be fantastic. Sort by nations within score range then sort out everyone with recent activity, any other bloc than gray and filter out anyone in an alliance.
It takes so long to find proper inactive raid targets it reduces activity within the game. I know they have probably been suggested before but the filters could be a pretty quick feature change.