I had the great opportunity to work a liiiiiiiittle bit with marian on testing those XML.
Exposure is your personal taste, marian's goal was to achieve an image as close as possible to the one shot by a real Pixel3 phone with the same gcam version. You can find every kind of comparisons on marian's shared folders and OP6 shots are really close to Pixel3 (considering different hardware and optics).
So again, if you like having a +2 on your settings, go for it. You gotta enjoy your pics, but it's personal choice.
To me TILL TODAY no one gcam version is better than beta19 + marian settings.
credit to: @AcmE85 aka Marian. Man tks to you I did the most beautiful photos of my son from his birth till now. And you know i really mean it.
+Props to the creator of marian xml
+Props to the devs
Also, just to add i have been using xtreme beta 19 + marian xmls for the longest time.
I hope the devs could make top shot, slow motion etc. work flawless and make night sight capture a little faster