Many of my clan mates including myself often have builders doing nothing, either because they have no resources to upgrade or everything is fully levelled up.
As you basically have to buy the builders with gems in the first place, wouldn't it be an idea to have a tab where you could offer your builders for hire to your clan mates, For those who don't or can't spend real money on in game gems, but could hire your builder for an upgrade in exchange for resources that you can ask for or have a set amount per duration period.
Just a thought.
Dan



