Honestly the addition of Rob Lowe and Adam Scott is awesome. Paul Scheiner character's was always too much of a Jim Halpert clone and they gave him a proper way to go: finally getting an interesting job in the private sector.
Just like Amy Poehler was a feminine version of Michael Scott, she is now a completely different character.
This show is definitely on the right track !!
I 100% agree with everyone you said. I absolutely adore Adam Scott... his character and his interactions with the rest of the cast has made the show even more enjoyable to watch if possible. I love the Chris/Ben combo... classic good cop/bad cop... and how Ben always gets stuck with the bad news. The show has been pretty great this season.