Were you enjoying Android Jelly Bean's App Ops feature and the extra privacy options it offered? Because as of KitKat's version 4.4.2, it's already gone. According to Google, it was never supposed to be in there in the first place, and it doesn't sound like there are any plans to include it anytime soon.
Beyond being a step back for Android, this could cause some problems for developers. A post from OpenSignal's blog details a sudden drop in their app's ratings caused by user hesitance over a new set of app permissions that OpenSignal was not aware of. It's not entirely clear, but OpenSignal suggests in their post that the removal of App Ops is a likely culprit.
So, one way or another, be aware of the change and consider the impact it may have on your apps!