I can’t talk about relative priorities (I don’t know about them). What I can say is that Classical is by no means regarded as “done” by the devs.
I think you are correct to describe Roon as having been relatively timid in resolving conflicting metadata and projects which take a “braver” stance are under active development. Artist Equivalence issues have been a driver for such work. When those projects go live the devs will be keen to hear feedback about them and that will be important when considering wider application of such concepts.