I like her neck set it ties in well and it's set high but not like a goose, but her neck itself is a little short and thick for this age. She's got a nicely shaped had and is slightly narrow through the shoulders but has a decent sized hind end I think will shape up nicely.
Now, what would be a deal breaker for me is her pasterns, they are extremely long. If you draw a straight line from the middle of her leg at the top, all the way down to the bottom it should touch the back of her hoof, which it won't. She's actually a bit back at the knee too bit it's hardly noticeable. With her pasterns being so long this will definitely cause problems for her in the future including the possibility of blowing a tendon and being a major vet expense.
We have a pony whose a little weak in the pasterns behind and it's taken 10 years but she's having some lameness issues at the present and it's the tendon at the back of the ankle (the one the bears the brunt of their weight when they aren't conformed correctly). And I'm just hoping we can get her sound. That horse is going to be a lot weaker, I'd expect lameness issues a lot sooner than 10 years with moderate work. It would also be a big blip on the radar in the event that for some horrible reason you had to sell her because you needed the money ASAP.
My advice, although she's cute, pass, another one will come along soon that's got a better conformation.