I'm not seeing the cowhocks that paintedpastures mentioned, to be honest. Toes out a bit more than is seemly, yes, but nothing as extreme as cowhocks. Of course, it's impossible to tell without a good squared-up pic from straight behind.
The biggest thing I see is...holy upright shoulder, Batman!
An upright shoulder can make it more difficult for the horse to tuck in, as is required in jumping.
Her neck is short and thick, but that's typical draft. Show me a draft, other than maybe a clyde or a shire, that DOESN'T have a shorter, thicker neck.
Her back may be a little longer than is preferred, but I don't think it's extreme. Certainly not enough to make it difficult for her to jump.
She's a wee bit over at the knee, but that's pretty common.
In the first pic, she looks pigeon-breasted and it looks like her neck ties in EXTREMELY low. In the second pic, she doesn't look pigeon-breast, but her neck still ties in a little low on her chest.
Honestly, I'd like to see some good squared-up pics of this mare on level ground.