Yep...Schitt Yggdrasil....a superlative A/D. And i choose to disagree about best methods for room correction. IMO it is alway better to have a room that requires no DSP for room correction. But certainly deal with the physical domain first, the digital domain secondarily. I suggest you read more and react less....
I suggest you think more, react less, and lose the attitude because from where I am sitting you are looking pretty silly right now.
1) The Schitt Yggdrasil is a DAC, not an A/D.
2) Acousti-Mat is an acoustical isolation product, mainly to keep sound out of in. It will prevent things from vibrating, but it is not going to control room nodes. Again, all you have talked about is something that is an acoustic product, but does not treat the fundamental acoustics of the room, other than saying "first reflections are controlled". What about bass-traps, front wall diffusers, back wall reflections, etc. Based on what you have written so far, I have little confidence your acoustics are "spot-on".
3) Did you not start a thread looking for a 1/3rd octave EQ? No analog circuit can do an eq like what can be done in the digital domain. That has nothing to do with room correction which you seem fixated on for some reason. DSP can also do balance super-fine, and can do all of it with no sonic signature if starting with a digital signal, even maintaining phase exactly as it started. Try that with an analog EQ.
p.s. when it does come to actual room correction, no room is perfect, and when you get into details, no room/speaker combination is perfect. Yes acoustics always comes first, hence why I stated right away that your acoustic were likely not spot on, and right now I am much more sure of that. Given they aren't and your speakers in combination definitely are not, some final room correction could give a flat baseline from what to adjust the highs, which without taking measurements, may already be reduced for acoustic/speaker reasons.