What I have done is flash the "WW" (World Wide) version of the software, bringing the Google Services (and even more crapware along the way). I find that overall the phone is much better that way.
To do that, however, you'll have to flash manually the device. I followed this thread in XDA and it works wonder: http://forum.xda-developers.com/zenfone2...
- Getting the phone into the Bootloader Mode is easy, but getting the phone into the Recovery Mode is quite tricky (needed for step 5, in case the phone isn't picking up the updates by itself). Google how to do that, you have to release the keys in a certain order with a certain timing.
- I don't know if future OTA will be picked up automatically by such a CN phone flashed with WW software.