Been listening all night. Don't want to stop.

[ogs]

Your setup is actually very clever. Audio routing within the SHD Studio allows you to send L and R to separate outputs. I researched a solution like this for Phantoms (to skip Dialog and Spark) a few years ago. At that time there was no (good) way to do it. If the SHD+Dirac existed back then I'd be a Phantom owner myself today!
Some Toslink implementations can support 192kHz. The main optical on the Expert amps and the Mutec for example. And the 'big' Phantoms... I do not think high sample rate is the most important, however. My current setup is limited to 24/48.