I’m disappointed that you can not have multiple stereo outputs in the montage window without changing to some surround configuration. This is a major issue because you can’t have one file route to a different pair of outputs to do A/B comparisons in hardware like the Dangerous Monitor ST, Crane Song Avocet, etc. You’d also want to bypass the master section as well since the additional file or files would be your “B” in the comparison and shouldn’t get processing in the master section.
The obvious problem a surround configuration causes is that you can’t use stereo plugins in the master section.
If anyone has a viable workaround I’m all ears. This one issue is the main reason I can’t use Wavelab for mastering start to finish. I end up mastering in something else and using Wavelab to double check my work, add metadata, and create DDPs.