I was talking to the Canadian national team coach this weekend and he was really pleased to see the riding be so influential at the Olympics.
I'll add here that this weekend, I did my part to improve the future standard of pentathlon riding. As one of the organizers of our national championships this year, I came up with the idea to let some of the younger kids ride, even though their age group doesn't require riding. We have a lot of good riders in our ranks, so why not let them experience the pentathlon riding format in a low-pressure situation?
We had half a dozen young (14-16) pentathletes riding on the pre-competition day. They rode the competition course on the competition horses. Our judge and timers were present and scored them as if they were competing. We mostly stuck to the 20 min/5 jump warm-up rule, except our goal was to make sure the kids were comfortable when they went into the ring. One rider had a more difficult horse and we talked about strategies and took an extra jump or two. Ride went beautifully as a result.
IMO, this is the best way to raise the standard going forward -- get the kids riding in the pentathlon format as they develop in the other phases. This keeps the kids who love riding interested in pentathlon, and it gets the kids who love running/swimming/fencing/shooting motivated to improve their riding skills. That said, most of our kids love to ride, and don't need any prompting to get on a horse.