I haven't acquired a legendary robe or the one off the splintered reef, but so far robe models are incredibly underwhelming. I'm not expecting giant pauldrons and Maleficent-style hems, but some variety in robe models would be nice, seeing as how Humility looks like a generic black robe and Effigy's Husk is hideous. Arkemyr, of all people, should definitely not look like a monk.
The Huana all have nice robes, so it's baffling that robe armors all look so humdrum. The bejeweled mantles and full-body robes of the Huana aristocracy look so much nicer than the actual robe armors, and it's particularly baffling because all other armors got some love as far as unique looks go. Slap full-length sleeves on the Huana robes and I'd go for that over the existing robe armors.
I mean, I don't mind the regular robes looking like a monk's cassock, but I'd figure that unique robes would actually have unique models, not just retextures (Humility looks exactly like a tattered robe, Effigy's Husk is a retextured Fine Robe).
Robe wearers deserve some love too.