Knowing the end point it just felt like a slow march to a doom the characters couldn't see, but still were all that interesting to watch getting there. In the book it's about buildup until it burst open at the wedding, but the show made it more like killing time until they could kill them off.

Yes! That is also my problem with the Cat and Robb story line. It's also my issue with the Sansa story this season; though season 4 may be better for her.