Yeah, I never bought Perdue substantially outperforming Trump or (in a runoff) Collins/Loeffler, and there certainly isn’t much evidence that he’s "very strong in the Atlanta suburbs." We’re really not going to see a lot of split-ticket voting in this state.
Agreed, Perdue is no Unbeatable Titan. Both Georgia seats have a good shot at flipping, I'd say they're Tilt R right now but if the national environment is at its current level on Election Day (or even better for Democrats) then they'd probably be pure Tossup races.