Before I saw what you wrote in the bottom, I was wondering what others where saying.
This is a superb animal, big jells, large hind quarters, yes a little on the rounded side at the moment, but I am sure these where not taken in the show season.
The bottom pic, see's him a bit fitter, needs a little more muscle, and otherwise he looks good.
I have a 18 mth old filly:- sir "Waralle Wr Montana" reg, AQHA.
dam "Cayuse Beauty Bars" reg, AAA
She is registered appy. And stunning.
You should do well in the ring.