i`d say appendix, but it`s hard to tell from the pics. A steady side shot and front shot and bum shot would be helpful, nothing like a picture of them trotting helps either. I say appendix because she`s definitely QH there`s no doubt about that but she`s got a longer leaner leg and neck than most QH, good back length too. Looks like she could jump a bit actually! She also has a thoroughbreds butt, not the compact boxy QH one.
If something is not to your liking, change your liking- the only thing you can count on in this world is change. ♥