I wish they would have taken their time and included more book content. They still have some content from FFC and DWD to use for next season, and the 6th book might be out by then, but then what?
It takes him so long to write these books, they'd have to either take a 3 year break, or finish it before the books (most likely option). Had they just stuck closer to the story line, they'd get a few more seasons out of it and wouldn't have to pass the books. But alas....
The things that REALLY irk me...
Sansa's storyline - she has replaced Jeyne Poole, and I kind of get that. But now Sansa isn't a virgin, which is actually kind of a big deal back on those times. In the books she didn't leave the Vale after getting there.
No Aegon - I loved his addition, and from where it left off, he joins Danny, Stannis, and the Lannisters as major players. Maybe they know something we don't, but it appears he will have a major impact on the outcome of this thing.
Margery and Tommen - so they had sex. Again, that's a pretty big deal. Legitimizes the marriage and all that. In the books, Margery is actually thrown into a cell because Cersei has her virginity questioned. Cersei makes up a bunch of accusations, but upon examination, her maidenhood has been broken. Again, this is a pretty big deal. She's awaiting trial, but assuming they declare she is not a virgin, her status as queen would be revoked. Also in the books, Loras isn't even gay. But they've been running with that one for a loooooooong time now.
Cutting out the Iron Born - they are a close 5th IMO, and will likely make a lot of noise.
One cool thing was the white walkers attacking. That hasn't happened in the book yet, but I'm sure it will soon.