I'd be concerned about his handicap mark. He could run well against very good horses without winning, and for the sake of showing he isn't good enough to run in a Gold Cup, we could mess up his chance to win a big handicap.
I've got two or three more four-year-olds to run in the next couple of weeks who could yet become Triumph Hurdle contenders but this horse would definitely be the highest-rated on the Flat.