We are apparently on the same schedule. I finished this yesterday as well.
I do feel completely different about the Doug Stamper plot line. He had a huge influence on how this season played out with the upcoming election basically playing both sides. I thought that was some pretty good stuff. The girl, Rachel Posner, from way back in the first episode of the first season was the prostitute that was with Peter Russo when he got pulled over for drunk driving which Frank had ordered to be covered up with a bribe. Later in the season, she was used again to bring down Russo when they needed him out of the picture. She's the link to all of those wrong doings as she knew of some of the involvement. I think if you look up the plot line for season #1 it'll bring back a lot of what you may have forgotten.
The last episode was anti-climatic as far as excitement goes but man, it really makes me wonder how Frank will recover from what transpired in the last minute of that episode. Overall I thought it was another great season of the show. I'm hooked and wanting more. When does the next season come out anyway?