The episode, and the series as a whole, was quite enjoyable. I got to see my favorite characters run around and do new things. The duel was what it needed to be to show how much stronger the characters have become since Episode III.
My wife and I disagree about the outcome, though. Most will probably disagree with me, to be honest. I think Vader and Obi-Wan should have ended in more of a stalemate, mostly to keep Vader looking like a threat. I haven’t seen much of the animated series, but going by live-action I just see a series of losses for the Sith Lord. He’s seriously lost his status as a threat. My wife dismisses it with, “Well, yeah, he’s just a big loser. Always has been and always will be. And Obi-Wan is always better.”
Maybe it’s the advantage of always having the moral high ground.
I’d have to check, but I thought the plan was to separate them. Vader didn’t realize his kids had survived, let alone that he had two. This way even if he found out about one the other could be kept safe. It’s just that Bail offered to take one. It’d be cool if he could have at least sent money to help support the other one, though. (Maybe money funneled through him from Padme’s estate?)