Many mastering engineers rely on outboard great for processing. Not having a real 2 track loopback is a huge PITA! I don’t think most folks are asking for a multitrack daw, but 2 track capture (like EVERY OTHER MASTERING CENTRIC DAW) should be a no brainer. It’s not a matter of having other software (I have PT, Cubase, Reaper, etc…), I’d just like to keep it all in one program. It would be nice to “punch in” on processed mixes (again, like Sequoia, Pyrimix, etc offer). I love WL, just wish they would address this issue. It’s the one thing that keeps some mastering folks away.
WL has always had the ability to customize the work environment. If you don’t want the option don’t use it. It’s the #1 complaint I hear from peers when discussing DAWs for mastering. Should be easy to implement. More folks want it than not. So far you seem to be the only one railing against it.