I was a bit 'meh' on the whole. I loved it at the time, mostly, just because it was GoT, but thinking about it it could have been so much better.
Loved the nods to S1E1:
Lord Umber = Bran - we should have known he was in trouble from the opening scene of him running through the crowds. Bran ended up unable to move, so did he (attached to wall). Could the NK be a Lannister from this? (Don't really think so, but it's a thought).
King's arrival = Queen's arrival
And then to S1:
Bran with the girls referring to all the sex scenes. Especially Joff from later series - does the fact of how nice he was to them in comparison to J suggest he won't murder the brothers?
Ned was going to tell JS about his parentage - he finds out near Ned's statue
I do think it was too rushed, and too busy. I think they could have left the King's Landing scenes to the next episode, and kept all the action in the North. It was too box ticking - let's take the register, as it were. Brienne could have been mentioned, not seen, for example, and then brought back properly next time. I thought some things were rushed through, yet, despite that, it seemed very slow.
I didn't like the dragon-riding scene at all, though thinking about it it had a reason for being there. It showed JS Targ side, and I thought the look from the dragon was 'oh, look, another Targ' as much as jealousy / protectiveness.
I love the idea of another dragon. We have the four sigil's in the credits - maybe the heads of the four houses could ride them together: JS (on the ice one - he is dead, and a northman to boot), Gendry, Jaime and Sansa. I know only the Targs can ride them, but maybe that's just not true but no-one has tested out the theory?