Some new ideas...

Clan ideas: have a status bar that says the last time a clan member logged into there accounts. That way a leader or co leader can identify dropped/abandonned accounts and make decisions whether to keep them or not.

Clan Ideas: After being raided and losing to the attack, some users post their defence replay. Allow other clan members to Revenge the attack.

Builder ideas:give the builder the ability to help another builder. So that way there is a greater benfit to having more builders and there are more methods to speed something up. So if an army camp takes three days to build and you add two extra builders to it, it only takes 1 day. And you can add a minimum so you cant get an instant build. So like add a builder per 12 hours. So if its 12hrs the max is 2 builders, if its 24 max 3 builders. That way you dont eliminate the need for gems either.