Misc thoughts after watching the weekend:
Rolex needs to be tougher. Compared to Burghley, Badminton (last 2 years) and the WEG it is clearly a 3.5 star. Thus, we can’t put people on teams based on Rolex results alone, and it is expensive to send them overseas. We need to have a proving ground on US soil that lets riders get the really tough XC experience they need.
I’m not sure huge strings are the answer. Our riders with huge strings (Buck and Phillip notably) aren’t winning championships. Based purely on the numbers one would expect them to trounce the Americans with 1 upper level horse only, but that doesn’t really happen. I think maybe there are diminishing returns- if you have 8 advanced horses you probably aren’t honing them, choosing the perfect schedule, etc as you might be if you have 1-2. Sorry to pick on Buck, but he has zillions of advanced horses out running all the time, and only one (Reggie) with any significant 4-star placings (and even then also with several notable team failures.)
One reason you see so many NZ and AUS flags on the leaderboard this weekend is that the European champs are still to come (next weekend?) So the European riders have intentionally left some serious contenders out of Burghley this year.