Couple things.
1. Yeah, awesome - Richard's mysterious past!
2. But wait - what did we learn in the course of this backstory? How old he is? That he had a wife? More details on his job description?
3. To me, it was nice... but no revelations. The blanks that got filled in were all pretty small.
4. You've got seven episodes left, and the ENTIRE episode is about this dude's backstory? This dude whose backstory gives us... what? Did anybody spot anything game-changing or revelatory here? We knew he was immortal; that he served Jacob but was recently downsized;
5. Jacob is nice to look at.
6. The island's not hell. Oh wait, we knew that from season one, when the producers kept saying:
7. "The Island's not hell."
8. But wait! The island might be hell. Because there's a lot of words for hell. That's what Jacob says, and he's handsome, so it's probably true.
9. The man in black is evil. Why is that, Saffie?
10. So... the show really boils down to "good vs. evil," and the island is just this place where the Devil (but don't call him that, he's just a black man - i mean a man in black - who embodies evil) is trapped, because if he gets out, the world will be full of evil.
11. But wait! The rest of the world is WAY full of evil. The man in black was trapped on the island during the Atlantic Slave Trade and the Holocaust, and those two things got along fine without him. So the idea that human society is basically good, unless this dude gets off the island, doesn't do anything for me, because I know it's a lie.
12. Good-versus-evil is really boring. Great art - including Lost, for most of its run - is about complex people working through complex problems. Maybe Sawyer has his reasons for screwing people over. Maybe a professional torturer might not be such a bad guy. Maybe murdering your mother's husband is an act of love. Maybe even Ben got a raw deal in life. Cylons can be good, people can be bad. Tony Soprano's a big softie at heart.
13. Example: it's possible to read "The Iliad" without knowing that its author was Greek. The "bad guys" - the Trojans - are neither worse nor crueler nor stupider than the Greeks - just differently flawed.
14. I would love there to be an inversion, and find out that Smokey/Not-Locke/Man-in-Black is really good, and Jacob is bad, but i find that extremely unlikely.
15. Here's an interesting thingie about the episode:
16. It was a great episode. But the rest of the season has a lot of heavy lifting to do.