I am with you. Before I was a WaveLab user I was using a combo of Pro Tools and Waveburner for mastering. I knew Pro Tools well from my recording/mixing days and Waveburner didn’t do any analog I/O stuff so it worked for me at the time.
When WaveLab came to Mac I thought I would be finally using just one app for the entire process but after a few days I just felt completely handcuffed and limited so I reverted back to Pro Tools for the analog I/O stuff and only used WaveLab for final touches, final assembly, and rendering all the master files from the montage. If I do a project that needs to analog gear, then I can do it 100% in the montage. I LOVE the montage.
Anyway, a few years ago I move from Pro Tools to REAPER for the analog I/O capture stuff and with the flexibility and amount of scripting that can be done in REAPER, it’s sped up my workflow by a ridiculous amount.
So as great as this one feature would be, in my opinion WaveLab needs to see a variety of improvements in this area to catch up to some other competitors and get to a point where I’d consider using just WaveLab and no other DAWs for the mastering process when analog gear is involved.
While using two apps might seem like a headache and slowdown, REAPER and WaveLab are so efficient for the tasks I use them for that it’s actually a net gain in terms of time, workflow, and enjoyment.