Thanks for the update. Sucks you had to sell it !! I think I've made up my mind to get the 2019 SC 5010 instead , the $3,400 aluminum build. I've never had luck with low end sram either , probably ditch the low end shifter and derailleur for a X01 sram.
It was a rad bike. I sold it already though... I bought it under the terms that I sell my 160mm bike and 120mm bike, both 26"... Unfortunately, they never sold, so I had to let it go.
Changes i would've made: ditch the GX, got with XT all the way around; install -1 Works headset, 140mm fork, ditch the Bontrager seatpost.
The GX on that thing was garbage, hated it. Had several mechanics look at it, never shifted well.