My comment:
I think you could also have an axis for how much the work is in conversation with the very concept of Medievalism?
Which sounds similar to its didactic authority, but that's about the works relationship with the audience.
And not how much it resists or accepts the cultural canon, but how it's engaging WITH that cultural canon. Something can be very very "tropey", but using those tropes to examine the nature of those tropes. Or it can be off doing its own thing but without any real self-reflection on it, it's just using the setting as a backdrop for its stories.
Basically how much is the work examining itself/the very concept of medievalism vs just using the setting without really thinking about it.