I didn't see the original photos, but she looks like a very typical Aussie standy.
Long back, weak and very straight quarters with a roach back. Not a bad shoulder, clean straight legs in front, but possibly a little cow hocked behind (may or may not be, can't tell for sure without a good photo from behind with horse standing square).
Conformation won't change in 6 months for an adult horse, only muscle. The underlying structure is always the same ;)
See how her back arches up slightly towards her loins? This will weaken her back and carrying capacity as far as being able to collect goes, coupled with the weak, straight quarters. I certainly wouldn't expect her to go past the very basic levels of dressage and jumping, but she will be a good all rounder if you are not looking at being hugely ambitious on her.