I mentioned it in another post, but I loved Siz and Tosha's conversations about ethics and forces of history so much. They reinforced so many thematic bits, and if you look at them in retrospect (I did the other night when I was looking for something) you can see that Tosha is absolutely correct when he says to Siz (after his return from the dead) that he warned her exactly what would happen, and sure enough it's all there. You just have to connect the dots.

(On a similar note: all the conversations Tosha and Lucius had about the problems of building a society rather than overthrowing a country. Because it's all stuff the Order will have to deal with as they do the same thing -- we saw a lot of it playing out, this summer -- and although it will work for the Order because they have entirely different and much better motives, and a leader who is not Sociopathic Evil, getting those questions onto the table up front was really a nice contrast, I think.)

I also agree that Reg and Sirius's last conversation was so very much an example of this. It didn't pay off until the end, but once it did, it really paid off.