Mmmm,
I met a skipper(UK) who had indeed passed his renewal wearing 2 hearing aids and the CAA said it was OK, "acceptable under JAR" were his words to describe their comments.
His AME was as in the dark as everyone else as to the official position.
The "official" position does indeed seem somewhat murky at the moment. It would be nice if someone could treat hearing loss the same as corrective lenses, particularly as we all wear hearing aids full time i.e. headsets!