I would vote for a special mastering section, for example like the project page in Studio One, for one important reason.
Mastering and maintain a complete set of projects in one view with global tools and fx. "One ring to rule them all"
Good effects for mastering, like limiter or eq, are only one side of the complete mastering process. There are many really good and professional sounding 3rd party vst's an the market.
A good workflow is the key to success, not only the quality of fx plugins.
Again the example of the mastering project page in Studio One. In this page you can arrange and sort your sequencer project files, set meta tags (ID3) and have access to it. A simple click on a song-project and it opens in sequencer view for further work on it. Very nice and fast for adjust some final things in the song and mix.
The mastering view automatically detects when a song-project has changed and gives the ability to render it without any manual bouncing steps.
So you always have a complete view over a set of projects. And such a view is more than a mastering tool, it also helps to organize songs.
And with one click you can export all the tracks to an cd album (DDP image), to mp3, upload it to a soundcloud set or an online music distribution system.
I don't see Cakewalk in the role of a developer for high quality mastering plugins. More as a bakery that gives me a program with a good workflow to use good plugins.
_Markus