I am using this ROM as daily driver, it's really good.
There are absolutely no bugs, its the final build it also supports vulkan you don't need vulkan activator.
The difference from MIUI and AOSP is that, this ROM is highly customisable + if you use AGNi kernel with it, it gives nice battery I had 33% left I checked in settings it says 2hours, also the gaming is fine. Since this is Oreo you can enjoy all features from Oreo, I am not flashing Pie roms because they are still under development, so it's just better for devs to fix those bugs.:good: