Except while the images were happy, the underlying themes were not: Hannah, Adam, Marnie and Charlie are all back to square one. Any personal gains they've made in the year that the show has depicted were erased with one single montage. It was "Girls" as "The Graduate": the characters won the battle, but lost the war.
If this were school, the girls of "Girls" would be failing. But it's life, so it's even more depressing. We're already eight episodes in to Season 2, and the girls' togetherness scores have only decreased. Hannah's suffering from OCD, Marnie is desperately following Charlie around Manhattan, Shoshanna is hooking up with doormen, and Jessa is missing.