Hi, I found this LP ROM on vietnam web site if you are interested. I did not make the Rom, all credits go to the developer.
It got some nice features like theme G5, S7, LG home. UI is mix G4+G5, Audio come with Viper4AndroidFX + ExtremeMusic AudioFx. The web site is in vietnamese if you want to read you can use Google translate.
Vietnamese Tread link, you should look under section: A. LOLLIPOP_END, I think the rom based on D83820c firmware.
Rom download link and screenshot in folder of this link:
I running it on my G Pro2 F350L, battery is good, you should run it couples of days then apps will get update, enjoy!