Multiple builder upgrading...

Would be nice to be able to use multiple builders to upgrade a building. If it normally takes 1 builder 10 days. Would be nice to add a second,third, forth or fifth builder. To the same building upgrade to speed up the time. Town hall 10 upgrade using 5 builders would take 2 days using 5 builders rather then 10 days using only one...

That feature has already been ruled out as a possible update to the game. I like the idea behind it being similar to boosting spells instead of just lowering total time but it wont work out.