This game will soon be three years old. It will not receive any substantive changes any longer. Maxis lost its mojo, with several poorly selling releases in a row, and was closed down. The future of the Simcity franchise might actually be in doubt. Answer HQ is a gamer community website. The primary output is numeric summaries going forward from here to EA.
If you want to offer input to EA concerning a possible next installment of your game, you need to be posting on EA's Simcity forum, not here on ours.