Rolling Stone is a rag, it's pronouncements are meaningless.
Never heard of SEDALIA (70A: Site of the Missouri State Fair), and almost DNF'd in that quadrant, but Frannie saved the day with SAS (65D: Carrier to Oslo) and RIO (67D: Vegas casino).
Enjoyed PERSONA (17A: Who you appear to be), and 28A: Gem of a girl? (OPAL). Is EGGO (19A: Frozen product with blueberry and chocolate chip flavors) still a thing? Sanderson?