Interesting. I've always rather liked the older Theodora retex of Isabella (not sure why as there's not any model alteration), but I have been thinking that she should lose the Spanish crown. This is a very different spin on the same model. We have a Byzantine crown, lighter colors, and a cloak. The cloak and colors are probably the two things that make me hesitate, as the cloak just doesn't look elegant enough for the rest of her outfit, and the colors just look too cheerful. I really liked the dark colors in the older version. I'll have to think about this.
Speaking of Byzantines though, I think that the modded Basil II leaderhead might benefit from a replacement of his mytre with a Justinian-style crown.