Beautiful execution and equipment. I have one question: Every surface in the room looks to absorptive, starting with OC "glass" and rock wool sound barrier does the room sound too dead? Or do the holes in the peg mitigate that aspect and reflect enough back through the OC?
When I built my room I doubled that walls and had the whole thing spray foamed and then rock wool all surfaces. The room was so dead as to be spooky and actually disconcerting due to no sound clues...walking, talking etc. Then sheet rocked with Quietrock and Green Glue. At the moment, the room is like an echo chamber, but no sound gets in or out. Equipment to be moved in shortly and then acoustic treatments as needed.
Interestingly, my color scheme is an exact match to yours and I even have the same sconces!
I completely get why you have the system firing out of the corner, I have been advised to do this with my system, but it just won't work in my situation.
Best of luck with it.
Regards,
barts