I have to agree with this point of view.
@Aivaras
Wavelab’s audio montage can already be used as a single ‘completely reproducible working environment’.
Even if that were true, why would you want to reduce software with two autonomous editors to one editor? 
Each of these editors is streamlined for a specific purpose and there’s no obligation to use the Audio editor.
And about the Master section, if you don’t need the Master section you can bypass it (by clicking on its power button) and also remove it from view (Alt+F9).
In my opinion, Wavelab is more powerful and adaptable than the Audio montage alone (even though the audio montage is already enough for many users). Remember there are also batch processing, DVD audio and Podcast project types and you can store all these different file types under a file group tab, which is convenient for grouping everything to do with a project in the same place. You also have global project files. I think one of Wavelab’s greatest strenghths is its flexibility. It can be adapted to suit your particular purpose.
The following threads might give you an idea of the variations in different people’s workflows: