Glad you liked it... And I liked the flashbacks; they didn't add much to the plot, per se, but I thought they added A LOT to the chararacters... To me, it was kind of like the creators were saying, "Oh, you think you know these people, inside and out? Well, here's a bunch of stuff you DIDN'T know. You're welcome." Lee's flashback especially was interestingly symbolic (or, at least, the most OBVIOUSLY symbolic of them).
And, uh...don't expect much from Razor, since you've already seen Season 4. Yes, it's good on its own, but since it's meant to be primarily a tease for Season 4, that aspect will be a little blunted for you.