I'm not sure about that. I suppose it really depends on your interpretation of the results, but I didn't think the cosmic interferometer experiment convinced physicists of retrocausality, by-and-large.
As I understand the double slit experiment, this is a fundamental property of light as a photon exhibits wave-particle duality. If so, retrocausality in this case would just mean the fundamental wave function can be collapsed into actuality without time or space being involved.
Am I far off base?