I have enjoyed the story thus far, and like that the Hero of Ferelden gets more recognition than a newly created character.
The Expansion is a bit disappointing in the pace of which the tale is told, as it seems rather hurried. One seems to jump from one small quest to another with little time for reflection.
A point of minor irritation has been the seemingly neglected ties from the conclusion of the original game. In my only observed case, my Elven mage used his Royal boon to free the Circle, yet the Expansion seems to hold a lot of quests involving apostates, and has the Chantry still ruling over the mages. The largest kink in this specific tie appears from Wynne, who was in attendance when I gained the boon.
I have chosen to play it all as what will best benefit the character, but this shoves him OOG and has me as the Player using meta-gaming info to make choices. And this seems off for an immersive RPG title.
A smaller complaint comes in the form that certain paths seem restricted to a single path for success. For example, it seems from posts seen here on the forums that Sigrun must have her personal quest introduced before another quest is gained in the city. As I had already cleared the city, I chose to return to an earlier save in order to avoid any possible complications.
With what I have seen thus far, I enjoy far more than I dislike, but do hold that the expansion does appear to be overpriced at full retail price for what was gained.