I can understand why it is not ready for 'end users'. I just had to dig up this thread (sorry for resurrecting it). I just wanted to provide some feed back on what happened to me, and also thank you for pointing out how to reset the app settings to clear all the settings at once.. (It just saved me from a factory reset).
Basically, I went through the settings on KitKat, and disabled a bunch of settings for location, and contacts for apps that I felt did not need access to them. (I have had some friends email me saying they get emails from 'me', but routed through some other server, which means there must be some apps skimming some data from my contacts list)... Anyway, as of a couple weeks ago, I noticed that my location was not accurate.. It was as if it was GPS + Network Triangulation, but not taking into account wifi (as if wifi was turned off).. I went through the list, and set all location specific flags back to allowed, but it still did not fix the issue that all I could get was GPS + Network.. Wifi was not being used to give me a good location.
Not sure if this helps at all with any possible bugs/testing, but figured I would pass it along, and say I have #SeenTheLight
, and also thanks for pointing out the way to revert all my dumb changes..