Hey there!
Thank you so much for bringing more attention to LG G3. I've been developing for more than a year now and it made me really happy seeing my device on Linus Media Group! We also have Android Pie available to install which is almost bugless, but there are still some issues related to graphics renderer and stuff.
You might also want to try some others ROMs which add more features if you're into that sort of thing - all with HardStyl3r quality. Check the XDA forums!
https://forum.xda-developers.com/lg-g3/development
Also, it's worth mentioning we have managed to enable Treble on our device, you can check that out too! (as far as I know, it's available for d852 and f400)
https://forum.xda-developers.com/lg-g3/development/guide-create-vendor-partition-lg-f400-t3903385
https://forum.xda-developers.com/lg-g3/development/rom-treble-basic-rom-based-lineageos-15-t3906025
Greetings, and happy flashing!