This model looks really great. Hats off!
It also comes across really well as Terrorguard, but as Azzinoth it has one flaw:
Azzinoth is described everywhere as a Doomguard Captain (Even his soul fragments in the fight against Gul'dan in Nighthold are green Doomguards),
although in Heartstone he's amusingly depicted with Terrorguard traits, as beautifully illustrated in YourArthas' post.
But he is never shown with the Terrorguard-typical second stomach face. There he has his large breastplate, the "Bulwark of Azzinoth" (Also shown in the depiction in Heartstone)
As I said: Technically a really cool model. Just a small point of criticism in terms of lore-accuracy.