ACOK is simply a bigger, much more complicated book to film, and it only gets "worse" after this one. Too many characters, too many locations, too many plotlines. And the show has decided to deal with nearly all of them. 60 minutes is not enough to develop any of this, and the geniuses behind the show decided to give equal time and importance to everybody. The result? You end up giving importance to nobody. The show is moving ahead to nowhere. You don't see anything conflating to any particular point. Despite all the changes in S2 this is still a show that is trying its darnedest to be faithful to the source, and it simply can't be. It's not possible. So now we end up with a mess.
On a more personal note, Jon fucking blows. I don't like what either the actor or the writers are doing to this character. The guy's out-starking Ned Stark. So fucking dull. This could apply to a lot of the personalities in the show, actually...and the direction of the show itself. Showtime's little-watched "historical" show "The Borgias" is shot with more flair and style than this thing.
They have a good amount of time and budget for ASOS considering it is going to be split into two seasons.