I attended a clinic with a highly successful Grand Prix rider over the weekend, who trains regularly in the US with Steffen Peters.
It was an outstanding clinic, and the clinician had an exceptional eye. She picked many issues that I had overlooked, and completely changed the way I go about riding and training this particular horse. By the end of the second lesson, he felt absolutely fantastic, balanced, straight and uphill. I realised how much I have been allowing him leeway, treating as a green horse. She advised me that he is easily strong enough through the back and hind legs to perform a solid medium/advanced test, and that she felt she could get on him and ride some of the PSG right away. She also felt that he has got a huge amount of talent for the collected work, and that I should give away competing at the lower levels and just get him out to at least elementary/medium.
So that certainly changed my attitude to riding him, I've been treating him as fairly green and ridin him as though he's a novice horse, now I need to work him as though he is an FEI horse. Phew, lots to take in but it has certainly been effective!