Haha, I understand your motivation to "speed up" M to make something, that way I interpret your words. I also want to stay with Meridian, but there have to be a solution ASAP and not in the next decades.
Trinnov RC is not "only" the best room correction, it also improve the timing of the chassis of a speaker doesn't matter digital or analogue.
The "problem" using a Trinnov processor is, that now/current you loose MHR and for MQA it's not clear if it comes useable or not.
Why not M offer a "tape loop" like in old analogue times?
The sources are connected to the 861v6/8, get processed in 861 and available at the "tape out" in a HIRES format that the Trinnov will understand (no MHR in the first step).
Then the Trinnov get that data, make all the wonderful corrections and loop it back to the 861v6/8.
The 861 add MHR for the transport to the DSP.
If you have SE speakers then the final "fold out" of MQA will happen (or not).
Later on M can make their on solution like with integrated cards or a separate box maybe from Trinnov?
The "tape loop" solution can be made fast, so the owner have a very good and future proof solution.
For pure cinema freaks that want to have more then 6/8 channels, they have to go to Trinnov anyway to get all sweets.
800v3/218/271/8k.2/5k5s

/5kC/DSP3200/Reviver/
TT-ELP/Graham Slee Revelation/Trinnov Altitude 32/OPPO 205
__Ayon/HB/Shunyata/Miltzow -- power cables,
__Ayon/Jungson/Miltzow --analog, Miltzow-- digital,
__Vortex/WMA ,