Just a heads up: Capture One was just updated to 9.1.1, featuring "preliminary X-Pro2 support, lossless compressed not supported".
https://www.phaseone.com/en/Download.aspx
I knew I should not have been shooting compressed RAFs these past weeks… :-( At least I can process my future X-Pro2 images (which I will be shooting in uncompressed raw for the foreseeable future) in Capture One.