Megan's sci-fi theme for Heinz is what saves the account. Like her husband Don she is a complex person and is showing the world that she has other gifts beyond beauty. One is a strength in promotions.
Sally, Don's daughter, has fully emerged from her self-destructive phase and is learning to leverage the pull power of being female, young, and stylish. She has come a long way from chopping off her hair and masturbating in public.
Peggy is coming into her own as an adult. She opts to accept Abe's offer to live together. That's not what her Catholic mother has in mind for her but she is making decisions for herself. This growing sense of self could become reflected in her copywriting. Down the road she and Megan might prove competition for Don.
Meanwhile Roger could lose it all by being so self-absorbed and immature. He has gotten stuck in his euphoria about an acid trip. Turning inward depletes the energy he can invest in the ad agency. His fall could come if Joan rejects him for a more caring companion.