Update 7 continues to tune traffic. I bet they are waiting to optimize the worker/job units before increasing map size. They don't want to simply increase the size of the map because if they find a future fix that is more computational bound, that would cause a performance loss. When they finish optimizing the game code, then they can test on how large the maps can be without causing too much slow down.
Awww, you're cute.
They released an alpha-staged game, they lied and give the community crap for pointing it out. It's a bad game and they ran the Sim City name in the mud, it doesn't mean anything anymore.
I'm sorry but when a game that fits on a floppy disk has more features than one released in 2013 I feel cheated.