Still dealing with this. Certain jobs with fast combos like MCH and NIN are borderline unplayable. Players in large scale encounters (24-mans, towns, FL) run in place for several seconds and then all catch up at the last second. GCDs randomly fail to register. I know others dealing with similar issues who don't want to post here and opted to just play less.
Not going to bother replying again until it's fixed one way or another, but didn't want potential staff monitoring this thread to think it'd fixed itself or something.