Pretty strange... seems like for years now it's been white/gray vs. blue to indicate different status of network or Google connectivity. Don't know why they'd drop that all of the sudden.
It was a design decision by Google for Android 4.4. They give an explanation why, some of it technical (which is pretty bogus, really). Perhaps they are trying to take focus off Google services connectivity?
It was a little odd that the Droids kept the Jellybean blue when the KitKat update happened, because the Moto X & Moto G had the white icons with KitKat. Motorola employees said it was a Verizon requirement, so apparently the people at Verizon changed their mind and allowed the white icons to go through with this update.
There are a lot of people who really wanted the white icons, presumably to be as close to stock Android as possible. I think removing information unnecessarily is a poor design decision. If Google wanted the color of connectivity to be white and non-connection to Google to be orange (which it is if you pull down the settings notification shade, or pull down notification and hit the settings icon on the top right; with no Google connectivity, the icons are orange), they could have just kept that in the status bar. Apparently, if something is up there, Google wants it to be white or not be there at all.
All that said, I can live with this - it's fine. 99% of the time I had blue icons anyway, so, generally, as long as I see an icon, I know I have connectivity. I guess that's good enough.