Well I really like her.
In the first pic I thought she looked downhill but she looks level or even uphill in the others. Yes, roach backed. Lovely neck on her and superb shoulder, though I do agree she looks a tad cow hocked and she stands under herself a bit much with her hind legs. Acceptable hindquarter otherwise. Good pasterns, lovely short cannons.
All in all I see potential. I think given the right training she would do well. Assuming, of course, that she has the passion and boldness to be clean and fast cross-country. If not feel free to send her to me and I'll have her as a showjumper/show hack/dressage horse ;)