What should happen in clans!
Things to keep out of clans;
Builders been changed in anyway at all
Wall upgrades back to level 8 for elixer
Gem pumps
These 3 things will destroy the game they are quick fixes because everyone wants to be a max th 10 why don't you get farming and do it the real way.
Now what would be cool;
More defencive buildings
Different attacking troops;(bats, yeti,spider, Dark giant(freeze radius) etc
New king / queen such as; (Hog prince) (super skeleton)
Maybe some other ideas but can't think of them right now