Actually aside from Quentin, I think ADWD brought things back together nicely after a lot of political meandering in AFFC. All the pieces seemed to be in place to start wrapping stuff up at the end of that book. Not in 2 books as he got planned, but i think 3 books would have worked.
Dany got her mature dragons and part of the iron fleet. Tyrion is floating around there somewhere as well. And her story arc has brought back the Dothraki. So she is close to ready to getting to westeros. Kevan is dead and FAegon, Cersei, and the Tyrells are basically ready to bring each other serious damage. Euron also has the opportunity to wreak havoc on the Tyrells and eventually ally himself with Cersei. Dorne can go a couple of ways. (Partly) Join FAegon, Eventually join Dany, ... . All depending what you need for the story and their further involvement. Sam has reached the citadel possible discovering imprtant stuff on how to help fight the Others, or ... whatever GRRM has in store for him. Jon has been killed and (hopefully) ready to get ressurected and get bastardbowl underway. Skagos and Rickon ready to give him some extra manpower (possible). Sansa, Petyr, Sweetrobin, and Harrold are ready to decide what happens to their respective characters and the Vale further involvement. Only Arya is possibly still a problem depending on her current location in the books. Still training in Braavos, part of the little birds that killed Kevan as an assignment... not really sure.