stingersplash
There have been no changes to the ESA Descriptors and Regulations since early 2013 although the DWP guidance for several areas has been updated, so if you used the latest ESA guides you will have had the latest information available.
Even if you were found Fit for Work, it should have no impact on your current PIP award, the criteria are considered to be sufficiently different that a failure on one benefit would not cause a reassessment of the other.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems