I just watched it on Youtube. Yes, better choreo may have been enough to bump them up. They are what, 2 pts behind B/A? Well, the commentators said that intro was about 2 points less. The ending wasn't that great either...what was that little jump back by Meryl? It doesn't look much of a Tango move for me. How frustrating, knowing that this team could do better. Lots of potential to exploit in this team.
I don't know what the commentators were talking about. The intro and the closing aren't judged. The only thing I could see happening with the intro is either 1) the choreography didn't allow them to build enough speed to go into the opening steps, or 2) the choreography did not set a strong enough tango mood. I didn't think either of these problems existed, though. Plus, I can't see how they lost 2 points through something that doesn't count in the judging.