I might be in the minority but I really enjoyed season 5, while yes it was slow at first, I understand the changes that had to be made for TV. Plus it made for a better story IMO, while I love the books, I would rather see Sansa in the middle of the Northern plot line, I would spend less time in Dorne if they won't make an impact on the end game, trim the fat and cut off the lesser characters. Season 5 and 6 should be treated as one big arc much like the 4th and 5th books, they were commissioned and written together.
So far I feel like the start of the 6th season has been slow like most seasons of the show. The first episode re-established things, episode two was good and episode 3 kept it a float... from here on though I expect more, especially since I think I kind of know what will happen in episode 9 and I am really looking forward to that. The North is really much more interesting than Kings Landing now while in previous seasons it was the other way around.
I'm really rooting for my girl Sansa Stark.