I'm thinking that Aithusa was just like, oooh, pretty magical Pendragon lady is hurt! I can help! Daddy will like that, Daddy helps Pendragons all the time!

Yeah, I enjoyed it a lot, too, despite the weaknesses. It would have been nice to see Merlin get promoted, but honestly I can't see that happening until there's a reveal. In the meantime, he's Arthur's everything and there's really nowhere to go from there!