Well, you asked for an opinion so here goes... Much of what we do with horses in not natural. I rarely see horses running across a pasture completely collected, HOWEVER, I agree that training can go too far. I would never sacrifice a horse's soundness for a ribbon. I like my horses to look and be happy doing their job. I think soring etc. is wrong. I have saddlebreds and I do show a couple of them saddleseat. I try not to ask them to do anything that is really unnatural for them. Of the 5 asbs that I own, only 3 are suitable for SS. In other words, they trot through the pasture with elevation (no training, just breeding). My other two asbs are hunter pleasure horses, as that discipline suits them. They move very naturally and are asked to move in a collected manner that suits their conformation.
I'm with you DaisyKJ. None of us should be sacrificing soundness etc. I think all horseman should choose to put their horses in the discipline that best suits that particular horse. As for the Rollkur..WOW, that does look a bit overflexed. Personally, I love to watch dressage, but I occasionally question the happiness of the horse at the higher levels. I'll bet this sounds odd coming from an SS person. I am sure that many people see saddlebreds and think that the head carriage is abnormally high. My SS horses actually carry their heads pretty high. If they didn't, they would likely be hunters

. Here is my disclaimer: I don't know anything about training a dressage horse. My words are strictly novice observations. It is possible that upper level dressage horses are just so in tune with their rider, that their expression looks inverted. I know what you all are thinking...SS horses often look scared to death

. Some probably do, I hope mine look expressive and happy.