I have yet to meet an AQHO that is not downhill. not really. some will say , NO , my qh is not downhill. and some aren't, but every one I've ever seen was. it's part of what makes them good at cow work
That horse looks pretty even and like a nice overall 'using' horse, to me.
I recently rode a sweet Qh who was so downhill that it felt like I was riding one horse in front, and anotehr for the hind legs. very , very hard to find my balance in his dressage saddle, and felt really odd to me . . . .
I know a lot of folks like such a horse, and in a western saddle, you don't feel it as much.
I think for this posted horse, you won't need to worry about it. there is not much of a down hill orientation for this one.