I love how much of a cunt rogers daughter is, even when her soul has been saved and she's trying to reconnect with her daddy.
Of course I think Roger is right about that. She wants something from him enough to not ask for it directly. Maybe she's just afraid of being cut out of the will.
I saw that scene as showing a contrast between the two characters. Roger's daughter is someone who has fully embraced the "Summer of Love" vibe. She's committed to it, understands it, and is allowing it to give direction in her life. Roger, on the other hand, is only in it for the same reason he follows most fads: Because he's afraid of getting old. He doesn't identify with the mindset at all and is primarily going along with it because he feels like it is what he's needs to do.
He's sort of the inverse of Don. Both of them are seeing the world change around them, and while Don is steadfastly refusing to get with the times so to speak, Roger has never had any problems going with the flow. Yet, both of them are unhappy: Don because he is losing who he is, and Roger because he's realizing he doesn't know who he is at all.
On that note, why was Peggy crying at the end?
Part of it is Ted's return, reminding her of his rejection, but I think the bigger part of it is her new boss. He doesn't seem to take her seriously, and isn't playing by the rules. This has caused her to lose a lot of the ground she was able to build up under Don (and especially what she had when she worked for Cutler, Gleason, and Chaough) since she's now basically being treated no better than when she was a secretary.
I think the main theme this episode was showing who is able to embrace the changes of the time (Pete, Megan, Roger's daughter, Joan) versus those that aren't (Don, Roger, Peggy, Ken).