ADWD pissed me off. Between Tyrion's sudden attention to food and absolutely pointless sudden slavery, Cersei's "redemption", Dani suddenly acting like she's in high school (and yes, I get that she's 16, but you don't get to act like a queen this long and then have a sudden reversal into giggling empty airheadedness) and Targaryans crawling out of the woodwork, it just left me unsatisfied.
Add to that the fact that he took all this time because he couldn't figure how to solve the Meereenese knot -- how to get all these characters moving from different parts of the world to get to Meereen and Dani at the same time -- and then skipped out on doing it.
I will read the Winds of Winter when (if) it comes out, but I'm not holding out much hope that the series will return to its pre-Feast awesomeness. Too many characters; too many POVs.