I gave up on total integration and instead I am using 2 pieces of hardware:
1. USBC to midi interface. Local control "off" on the device so triggering a midi will go to the computer then back to the Virus to get a sound. This seems to work ok with little to no latency - https://www.amazon.com/gp/product/B087TX6N6R/
2. A USB-enabled mixer. I run the 1/4" outputs from the virus TI to this mixer, then a USB connection from the mixer to the computer. Currently using an old Allen & Heath ZedFX. Super old USB2 interface with only 44.1k fidelity, but it works ok enough for my purposes. I haven't tried it, but I believe since virus itself works as a sound card (without installing any software) you might be able to use that as an "INPUT" sound card and bypass the mixer, but I use the mixer because I have other synths I run through it. In all cases, I use the onboard headphone jack of the computer as my audio output monitor since this has the lowest latency to use the mixer as an input device and the onboard Mac sound card as output. I am using a maxed out MacBook Pro 16" fyi
This solution is adequate for me. I just do one track at a time, but I'd imagine you can setup "multi" setups with each channel on a different voice and do it that way, though it's going to be more manual than the old way, it seems to work ok with me. Of course Total Integration would be better but I'm not holding my breath. At this point ,Virus is like any other vintage synth to me... at least it has MIDI.
What I miss most is being able to audition new sounds from online libraries. I guess I would have to use SYSEX manager now, which sucks. I haven't dealt with that yet.