I received the final today, OPR6.170623.013, and had been on Beta (just the final Beta) before.
I'm on AT&T, and I did notice, on the
builds-page that it says "Not for TMO/USCC/Fi)". Seems a bit "odd", that it's NOT for Fi customers (or the others), if I'm "translating" that correctly.
This is NOT a statement that I know what Google intends there, just my interpretation.
I did also have "Google" (the process) totally nuke my battery last night too, went from about 95% to 30%, all for the "Google" process, even though I still had to download the final build today, it was weird. The download was fast, almost too fast, for nearly a Gig, so I'm hoping that most of that drain was actually attributed to the update process, and is just obscured in the Google process itself.
Before this, I had zero (real) issues with battery on the final Oreo Beta build, it actually seemed to be doing a bit better than Nougat, in that regard.
I went ahead and flushed my cache, and now I'm charging back up, hoping that the Google drain issue was a "one off".
Edit: I should mention, I de-enrolled my 6P from the Beta too, right
after installing the final update, and everything went "as expected", there were no more updates available, on my device.