Yes, Google changed that in KitKat. The explanation was two fold: first, people never understood the difference between a white and tinted icon. The second was that showing network activity in the status bar icon was using enough CPU that it was worth scrapping.
If you pull down the notification panel and press the settings icon in the upper right, I believe that the WiFi and mobile network icons will be tinted when you are connected to Google services and will also show network activity. (That's the case with KitKat on the Nexus 5; I don't have a Moto X with KitKat to see at the moment.)