Season two involves Tara (Toni Collette) escaping her alters at first, before eventually reverting and picking up a new one (psychologist Shoshana). I thought that might happen, rather than a loss of alters one by one.
I noticed in this season a problem that's been happening since season one. United States of Tara doesn't finish off its subplots well. In season one Kate (Brie Larson) has a relationship with her boss, Gene (Nathan Corddry). It ends with her sneaking out the back door of her own house. We never hear of Gene again. Marshall's (Keir Gilchrist) season one relationship with straight boy Jason (Andrew Lawrence) ends rather abruptly. Now in season two there's Buck's affair with Pammy (Joey Lauren Adams), Kate's infatuation with Lynda P. Frazier (Viola Davis) and her stint as fantasy character Valhalla Hawkwind, Marshall's relationship with Courtney (Zosia Mamet), and Kate's short relationship with Zach (Seth Gabel). All of these were interesting subplots that the show didn't really take appropriate care of in ending.
I thought the Shoshana alter was annoying. The introduction of neighbors Ted (Michael Hitchcock) and Hanny went well. I continue to like Marshall's development as a young adult. The writers refuse to let Kate's character fall into too much cynicism. She always finds a way to show solidarity with her family. Max (John Corbett) is still a great husband, but the pressures of dealing with Tara and his inevitable mistakes are handled realistically. I loved the result of Charmaine's (Rosemarie DeWitt) wedding to Nick (Matthew Del Negro) in the finale. The slow revelation of the problems in Tara's childhood was also done well. They look to be the cause of her dissociative identity disorder, but the show doesn't give everything away.