Resources and their production rates

Hello supercell :D,
i am a fan of clash of clans and i have a suggestion that i think would make a difference in the game, why do you not add a production rate feature just like the game boom beach where you can press on the elixir icon and it shows you the complete production rate of your resource with a minor feature ; if a elixir/gold collector is being upgraded it calculates the production rate with and without it so that the player knows exactly how much does his resources make per hour.

Thank you