I think the style will change for each type of series. There are different types of cover disks here.
Going back to part of the OP - I think Newspaper cover disks should quickly be booted sideways. These are much more “promotion” and less part of the publication. It is just something extra stuck on the front. Usually the disk has a clear title and artist of its own. And they are published at random.
Magazines are different. They are a specific product with combined printed pages and CD audio.
The BBC Music Magazine is a very good example. Words and music sold together as one. The way it is already setup looks good, clear, consistent. Annual volumes, 13 parts each. Seems sensible. And the titles are clear.
This is like volumes of a series. BBC Music Magazine is a major part of that title. The volume counts are consistent. And each issue has a subject. All throughout its time the title has stayed consistent.
The Uncut series changes over the years, but look at it as a whole list and the pattern stands proud. I still think that most of them should have the Uncut: name in the front. Everyone is Uncut. Again volumes in a series.
I expect Mojo is similar. I only have a few, but most of them are of a style “Mojo Presents: Fred sings”. So the magazine name is clearly in the title again.
(Another side tangent: the published dates are a mess. If a “July 2011” disk is listed then it was published in May or June 2011. Magazines are always published a month or two ahead of the cover date)
When I am working on Releases in MB I often think about how other people will see the data. Places like the BBC website, or other third parties pulling the data from the database. (Not just taggers) If they are looking up an odd disk then I think it is important that they get a working title. If someone interrogates the MB database and asks for “Title and artist” of a release then the release should make sense. And the Magazine name will often make sense as being part of that title.
Yeah… I think this thread is probably writing that bit… Just like new threads wrote how Audio Drama’s are different to Audiobooks… Those Style Guides are a bit behind the times \ out of date.