It's hard to critique her conformation from the pictures you gave. Try to get some of her standing sqaure from the side, front, and back.
However from what I can see I do really like her legs, and I think she's absolutely adorable. You say she's a little downhill and all that will really mean is that it will be a little harder for her to collect and work from back to front to get that self carriage, but if you work a lot on it and help her develop those muscles she'll still be able to achieve it. I think she'd make an adorable little jumper, personally.
"Always be yourself. Unless you can be a unicorn. Then, always be a unicorn."