Finally saw the episode. I think it offers a great deal to talk about, and I am very pleased with it as a whole.
Like most Glee episodes, it is honest look at a topic (sex) that says a great deal about its subject without saying "this is what you must believe".
I think that getting the most out of this episode requires knowing these characters. Yes, some things would have been apparent to those seeing the show for the first time, but the decisions made by these characters do not happen in the vacuum of this hour of television. Their histories lead them to these moments, making the decisions made more authentic.
I'm going take some time to reflect before I write in detail.
Meanwhile, Happy Thanksgiving to all!