I think she is yet physically immature. Overall, I like her build and think she will muscle up nicely. I don't have any problem with the neck or where it ties in.
She does seem to have a relatively short humurus bone, (from shoulder to elbow) and it is a bit tied in to the barrel. I would guess she may not be the sort of jumper who can tuck up the forelegs neatly, but that probably doesn't matter.
I think her hocks are great. low set canons, and a very nice gaskin. the hip is nicely angled, though, and this is my only real negative comment, the way the pelvis connects to the back look a bit tucked under, as if she may have a hint of a roach to her back. She also looks a bit wasp-wasted. I think, however, that as she is ridden and muscles up, those things will become less evident, or disappear.
overall, nice filly!