When talking about commetators, we're of course speaking about some kind of broadcast or coverage. Attending an event live is a completely different scenario. When I mentioned: "former skater, current coach" I wasn't referring to the commentator, but to the person that enjoys listening to the commentator, although not in need of explanations. As for you narrowing down the field to see who that person might be, just trust my word: somewhere in the world this thing is real. I think good commentators aren't so hard to come by, we should keep an open mind for that talent, which (in my experience) often isn't perfectly ovelapping the skating talent or the coaching talent. Some mediocre skaters, mediocre coaches, or even fans could sometimes make very good commentators.