I have LG G3 VS985 which runs the nightly CM12 5.0 ROM. I want to upgrade from 5.0 to 5.1, but last time I tried just flashing the new zip certain apps I had on the phone were not compatible, such as Google Services, which caused my phone to soft brick every time I booted up.
Long story short, I'm sick of the bugs on the 5.0 nightly.
I'm wondering how to get the latest nightly without deleting all of my data and apps, if at all possible. I'm using TWRP.
I considered flashing a new GApps version specific to Android 5.1. Would that work?