Multiple builders

It would be great if we could assign additional builders to upgrades. Say if your Town Hall upgrade will take 10 days, assign a second builder and shorten the upgrade time. If it cost a few gems or elix/gold, that would be understandable. I think it would be a nice option to shorten upgrade times without spending the full amount if I were to gem it. Thanks for creating the best app game of all time! Let's make it even better!!