I don't know since when this problem started cos I don't use my DK2 to much lately but I just plug it in to do a demonstration and I do encounter this problem.
The chromatic aberration correction is absent, so every thing shows a red/blue halo around, I did take a screenshot with the Oculus debug tool mirror that show there no chromatic aberration correction being processed:
Also ASW its not kicking in at low frame-rates so everything is choppy.
It seems that the Oculus runtime is just puling out raw processing.