On the page of a release, you will often (usually) not see any genre tags for that release.
Only when you navigate to the releasegroup you can see if/what genres it is tagged with:
There are two issues with that that I can see:
You will miss out on possibly useful and interesting information.
It does not help in making users aware or enthusiastic about improving on the genre database.
In hindsight, for me it has even been one of the main reasons I always thought MusicBrainz was not very interested in- or suited for managing genres.
While I can understand that ‘other tags’ probably should be unique for a release vs. shared over the whole release group, I see no good reasons why the genre tag should be.
Currently you can have it that the exact same album will show ‘soul’ for one release, ‘blues’ for a second, ‘jazz’ for a third, and no genre tag at all for the others.
That doesn’t make much sense to me, and it isn’t useful.
My proposal is that the validated genre tags get shared and synchronised between the release group and all it’s containing releases, and that they all get displayed on both the release page and the release group page.
That will both be an improvement on presenting all available genre information, and it very likely be a big boost to raise awareness on genres and get more users contributing and improving on it.