Doesn't this episode use the same type of framing device "The Menagerie" did with "The Cage"?
Kirk and Spock are always talking about Seven, but does Gary have scenes with Roberta specifically about the Enterprise? Are all four stars (Shatner, Nimoy, Lansing, Garr) ever in the same master shot?
Not really the same thing. The whole episode was shot at the same time, and the climatic scene at Seven's office involves all four characters. And Kirk and Spock and Seven and Roberta (and Isis) do interact on and off throughout the story.
There's no framing device involved.