The Apple Creative Summit is Oct 27-29. It is possible (though not guaranteed) that an update to FCPX could be announced there.
IF there is an FCPX update, it is possible (but not guaranteed) it might include C200 raw support.
Anytime a new camera or codec is released there is often a delay before each app supports it. This varies based on the app. E.g, I don't think Premiere Pro yet supports C200 raw either. I think DaVinci Resolve does.