Book 4 was my least favorite too. But then youhave to remember it is reallyOnly half a book as grrm divided the book by characters and we will hear the story about the remaining characters in a dance with dragons. I thought the idea did not work as it really feels like being left hanging in a way. I expect that the book will be more enjoyable in himdsight as soon as the next one comes out.
(excuse my typos. On my iphone in the most boring seminar ever addliczed on womankind)