I think this argument is completely bogus myself, Paul.
For one, Annie Power never had the form in the book to trouble Hurricane Fly. For two, UDS was essentially still an unknown quantity at 2m at the start of his open season, and didn't hit a big rating until he went to Auteuil. And three, it clearly made sense to go softer with Faugheen his first season in open company, until his progression forced Mullins' hand.
At a push, you could make a case for a Hurricane Fly/UDS race in the 2013/2014 season, but even then, it would be perfectly logical for Mullins to not want to over-face a young, enthusiastic, horse, by pitching him in against the best hurdler in Europe. Not when you could ruin a chasing career in the process.
The suggestion that Hurricane Fly wasn't highly-enough tried, simply because he didn't meet these three horses, is a load of old hogwash. In every race, in every season, he faced-down every horse that tried to look him in the eye. He beat multiple Grade 1 winners throughout his career; including Champion Hurdle winners, Aintree Hurdle winners, Triumph Hurdle Winners, Neptune Hurdle Winners and Supreme Novices winners.
It's about time some people woke-up, smelled the coffee, and got over the fact that just because he was never particularly impressive at Cheltenham - despite what two Champion Hurdles will tell you - he was an absolute monster of a horse, who commands a lot more respect than he gets in some quarters.