bent hickory,
In eventing, the changes have come very quickly over the last five years and have mostly been pushed by the Germans who have tremendous clout with the FEI.
First they increased the difficulty of the dressage test, which was originally intended just to show a rideable horse. Not intermediate dressage gaits and movements.
Then they abolished the steeplechase and roads and tracks, which reduced the endurance element on XC day from well over an hour to less than twelve minutes. So horses with bred in endurance were no longer at an advantage. If you could condition a relatively slow horse to run 12 minutes then you could play the game.
The show jumping courses, which were originally intended to show that the horse had gas in the tank on the third day became more difficult and like the showjumping courses in showjumping, which are designed to favor WB attributes–adjustability and spring–, and not just the proof that a horse wasn’t finished after XC. Another change that favored WBs.
Now the Germans are pushing for another format change–or so it seems. One of the very top German riders at the moment has said that showjumping should come after dressage and before cross country. He thinks that the way the sport should be run. The reasoning is that XC would then be on the third day and truly be the deciding factor. Only that is a really enormous difference in the very basis of the sport, and one that will again favor WBs. Why? It won’t test the gas in the tank left over after a strenuous day of competition. The endurance aspect will be totally eliminated. (And in one anticipated or unanticipated consequence, the dressage and showjumping scores will set the leaders before XC, so really time penalties will decide competitions. Get a low dressage score and a clear showjumping round, and then do everything you can to go clear on XC, even if time decides.)
The Germans recently ran a European team event and they used this format. Guess who won convincingly on their Hanoverian horses.
It all goes back to horses for courses.