Some of them are not tribute albums to a particular artist. My personal opinion is that they shouldn’t be set to a compilation, but I would have done so when adding it based on what I interpreted the guideline to be. I would also have set any VA tribute album to that, and only excluded ones by one group, since “various artist song collection” feels like a very, very inclusive definition.
I see releases of this kind more often than not added with compilation as the release type.
Here’s two examples of critically acclaimed albums on several top of decade lists and that have Wikipedia articles that primarily or exclusively consists of new tracks. I’m not cherry-picking here, I believe that I’ve tried to find the most critically acclaimed and commercially successful examples to bring forth to why this is a change, not a clarification.