So the diagnosis was correct about the "swirl flap actuator" being the problem. The SA says their technician found "30 fault triggers" but since I'm under "Coverage One" they need to bring in an adjuster. I told the SA "why even bother because it will be covered?" and he agreed but said it's "protocol" for them. Also mentioned parts might be "gummed" up in the air intake manifold and it might have to be replaced.
Apparently the adjuster takes 24-48 hours to show up so I'm in the process of getting a loaner.
EDIT: Turns out they will replace my air intake manifold.