One Button to Collect All Resources
Well, the title says it all. It's as simple as that.
As a player progresses through the game, it's fun to click on the resource buildings one by one in the early stages. This gives new players some fun things to do as they explore the game.
When someone gets to Town Hall 6 & above (which doesn't take long), it starts to get annoying having to click on the collectors so often as they either block your view of buildings you want to click, or simply because I'm too lazy to click 14 times in different locations every now and then when they generate enough for the icon to pop back up again.
I'm not sure about other players but its just how I feel and a simple suggestion.