Don't understand the dislike for the episode either, doing it all at the Wall was a great idea and I thought they did a fantastic job of pushing Jon to leader status and tying up loose ends. The kid killing Ygritte was way too obvious, but it's whatevs. Thorne and Tormund were badasses, the giants looked great, and that giant wall scythe was epic. As other have said, I just wish we'd gotten to see the actual fight in the tunnel.
I feel like not everything we want will be crammed in to next week's episode, but should at least advance Bran's story, show Tyrion getting his sweet revenge, Stannis coming in, and Arya going her own way. Dany I'm not worried about as not much important is going to happen for a bit with her anyways.