My guild was doing a mythic run for the BoE drops and a number of things changed dramatically from previous runs.

1) the small Pales were now immune to CC of any sort we tried.
2) the Gorean Guardsmen now had a chain pull ability or at least they used it a hell of a lot more often than previously.
3) there was sometimes agro from doing CC. I'd go to cc a mob, we'd CCed tons of times before and "BLAM", I was chain pulled into the trash mob

Has anyone else experienced this? I did a number of runs for several weeks, but haven't done any for the past 2 weeks.