My point is that the more you are changing stuff on him that isn't neccessary, you are only opening him up to the possibility of unsoundness.
My horse, since he has been doing 3rd level and now doing the small tour (dressage) has needed shoes simply because of the stresses put on them. He has good solid feet, but working hard for 6 days a week was putting a toll on them. Shoes, when applied properly, can also help affect how the foot flies, takes weight, etc.. For example my horse has the heels of his shoes extended behind his hooves and wears a type of shoe which has a large weight bearing surface which allow him to stay on top of the footing and make him more stable on his 4 feet. I have noticed quite a difference with the heel extentions.
With a jumping horse, the thought behind shoeing them is a lot the same, but with subtle differences as traction is more important (so your horse's shoes are not as flat as my horse's shoes), etc...
Don't fix what isn't broken is my opinion.