OK, using the steps above resetting data, and going back to playing the games normally as I do, which is usually collecting all my buildings, doing whatever LTE there is until my energy bar is gone, then banking my cash and logging out, here is where my data usage for this month is do far (my data month coincides with the 5.2 update, conveniently):
Crime City = 5.6mb
Modern War = 72.6mb
Kingdom Age = 44.5mb
Beyond the Dead = 45.6mb
Looks like whatever the fix for data use worked in spades on my ios system. I would ask now that whatever you did to CC you do to the rest of the games.