Man's got a stock model, no amount of entertaining characterization will save him from dropping [The Baron's Band of Embuggerance] in a patch or two.
I've not had much time to play thus far, like @Nyel but I genuinely can't tell how Wrathion is meant to come across. Take that bit right after he makes a plunge to protect Alex from Raz and then asks her for military aid 5 mins later and leaves in a huff when she hesitates right after being mauled. Are we meant to see him as impulsive, but well-meaning, since he did risk it? Are we meant to see him as a short-sighted dumbass, since he wants the symbol of the office while he has no people and so he would only be able to hold the position with her help, what with not knowing Sabellian's saved the flight in the interim time? Blizzard and subtlety in framing don't come together but while it's guaranteed he'll be the new leader, how much we're meant to like him as the expansion starts out I can't figure.
Past that, dragonriding is better than I expected and the actual questing and lore gives me Cataclysm main quest vibes, down to the tone of the levity quests being similar to the Hyjal infiltration or Uldum, for good or bad, except with far more gay couples bonding over dissecting murlocs. The Primalists are a better antagonist than the Twilight's Hammer and Raz better than Cata Deathwing, but that's not exactly a major feat.