We would like to see this feature in wavelab 12. New Advanced Crossfade Editor from Cubase Pro 12
What is it that"excites" you about the Cubase Pro 12" editor??? Most of the things can already be done in WL.
The thing I can see with a cross fade editor window
is One window for In-Out fade(s) instead like now Two steps
but that maybe can be useful as well when editing!?