I completely agree, but I think you knew he was going to got he second he smiled because I think he saw Rick changed. He saw a level headed Rick who existed pre-Ricktatorship that wanted to whatever he could to survive minus the craziness. I think it will be tough for Rick to come out of this with a level head, but the death of Hershel who was essentially the leader of the council and the Governor telling Rick that "he's the leader now" set Rick up to become the leader again. I see that whole speech as Hershel passing the torch. I hope I'm right, but you never know with characters and how they can constantly change.
I just really want to see what happens next. Morgan is set to appear this season and then there's that new guy they haven't introduced yet. I also don't think we've seen the end of Carol so there's a lot that has to be answered in the second half of the season.