Other CON's to the ProRes format from my point of view:
10-bit vs. 12-bit CDNG (up to 3840x2160 at 50FPS (47.952fps), 4096x2160 at 50FPS (47.952fps), and 5280x2972 at 30FPS (29.97fps)
Even ProRes 4444 seems to only be 10-bit so the only upside to using this vs. 422 is 4.4.4 chroma but at a the...