I had some problems with stable V8.5.1.0.
If I choose german language and try to open the developer options the settings crashed. Same with battery use. And the same problem with Epic 8.5.1.0 because this ROM is the base.
Agree with Zanr Zij, for now no problems encountered with 7.9.14. GPS works, 2G/3G/4G works, bluetooth is snappy and battery life is still amazing. For me it feels better than 8.5...