I really loved how we, for a chance, saw an Arthur who knew what he was doing and pretty much pwned everyone, instead of needing Merlin to do the work all the time. In this regard, and for the Morgana/Gwen sweetness, the episode wins.
As for the Lancelot/Gwen thing: I still like this Lancelot. I used to like Gwen up until now. Actually, I even liked her more than before when her relationship with Arthur started to develop, despite being all for the various slash pairings in this show. And she's so pretty this series.
Ans still she's turning into exactly the kind of Guinevere I despise. The fact that I knew it was coming doesn't make it hurt any less.