As a competition type mount, I think she's lovely. She has big bone on her legs and a great big hip. Her back is longer, and will probably sway in her older years, but it seems to fit nicely with her neck (I think it's a nice length, especially for jumping). She looks like she has nice strong joints too.
The only big minus against her would be that she doesn't have a very refined head, which seems a a bit unusual for a MorganxFriesian. But, at a competition mount I think she's just fine. Her head really only counts if she was to be used as a broodmare :)
If she has the drive and push for Jumping and Eventing, go for it! She seems structurally perfect.
Wait! I'll fix it....