Exactly ridergirl. That's what this is all about, dressage in competition SHOULD be going by the training scale or classical methods, or at least maintaining a focus on having a soft back at the very least. But it doesnt. And people are aware of that, but unfortunately this is the step that modern dressage has taken and I would say that we'll see it degrade even further in the future.
Re Totilas working more 'correctly' and having a back end to match the fronts. If that horse's hind legs were 'correct' they would be parallel to his front legs. If that happened, he would end up with smashed ribs and a rider with broken legs. It is not phycially possible for a horse to keep his hinds parallel to his front legs if the front's are heading to the moon like his are. Thus what I have been saying about being difficult to find horses now that can collect decently, not just 'fake it'. They are all bred to have really huge front end movement, so much so that it is not actually possible for the hind legs to catch up.