Well, more what I mean is, there's certainly a lot of interpreting you could do, but that's all it is. "Canon" is exactly what's not the point; the very notions of romance are vague ones that do not lend themselves well to categorization of the, "Well, this pair has X, Y, and Z true about their interaction, therefore it is a moirallegiance". It seems better to say, "X, Y, and Z are consistent with moirallegiance, but maybe that's not what's going on here."
Although, in fairness, I have a dog in this fight given my own meatspace relationships. Labeling is fairly innocuous on its own; I don't much care what people call my relationship with my dearest friend, for example, but there's always rider assumptions that go with the labels in question, and people are quick to assume something's not right if they're not met. I have literally been asked why I'm not fucking the aforementioned friend, for instance, because there's a good deal of cuddling and talking about sexual stuff that would be a lot weirder if either of us thought the other was actually serious, and the assertion that that's what the relationship ought to be is actually kind of annoying. Not that people are terribly obligated to avoid offending me, obviously, but it doesn't seem to me that it's a relationship terribly unique in its uniqueness, if you see what I mean. There's all kinds of nuanced history that goes into making any given relationship, and while the vaguely-defined cultural touchstones of romance do provide useful notions to build on, they're pretty damn confining when you start reversing the polarity on how language interacts with reality.
Which, I guess, really is just my interpretation at the end of the day - that all this troll romance business is a commentary on how silly people get about their definitions and mental constructs for what is ultimately something that defies that kind of structure by its very being. Whereas it seems your interpretation of it is as more of a framework to be explored, puzzled out, and applied to various situations in the interests of understanding. Which is fair enough, I suppose.