As i understand it, GApps, in all its variants (pico, nano, micro, mini, etc), and MicroG are something entirely different. I'm not sure which i would call the "standard" one, they are simply two different options and i would be quite happy if other maintainers would offer the option with a "security hardened MicroG".Gapps: There are two build variants, the standard one and the microG one. And whilst you can think about Gapps for the standard one, this is a No-Go for the microG variant. I will however add a phrase like "For the standard variant, the following applies:" after the "Don't flash Gapps on microG variant."
I've updated to this version a few weeks ago from within TWRP and then flashed the August build. No factory reset and no other issues so far.One necessary step to be able to use OTA updates from within the ROM is to update the TWRP recovery by installing TWRP 3.2.3-1 for amami.
IMPORTANT: BEFORE UPDATING TWRP, MAKE A 'NANDROID' BACKUP IN TWRP! - The first TWRP launch after updating TWRP will most probably perform a factory reset!