I think you missed the point of the California trip. You're right that Roger still brings very little to the table (as has always been the case), but you saw him get taken down a peg or two by little Danny. In Don's hash-induced haze, we saw glimpses of his obsession with death, his true desires with Megan, and even his lingering guilt over his desertion. Tack on the fact that Harry Crane set everything up, which emphasizes his actual importance to the firm, and you have a productive few scenes in the California sunshine.
I wonder what the folks at PPL will think about the new name. Technically, they likely own the protection for the name Sterling Cooper, though I doubt the writers of the show will bog it down with trademark infringement.
Such a great ending to the episode though - I wonder what kind of royalties they paid to get a Joplin song.
The whole Bob Benson thing better provide an adequate pay off. His mini-storyline is starting to get annoying. Although we did see some epic Ginsberg this episode.
Best parts of the episode by far, however, were the interactions between Peggy and Joan. Their relationship is so complex and this episode showed it better than any in recent memory. Nice to see Joan trying to assert herself for once, even if she did get rescued by Peggy.