The only thing I see is her neck ties in a little high and like said hocks are a little straight definitely nothing horrible. I also wouldn't worry about her whithers. Once she is rideable she'll build whithers.
A good trick for mutton whithered horses is using memory foam or the egg carton foam for beds under your saddle pad. It works great. Saddle won't slide as much and don't have to cinch as tight either. I use it with Sage right now. She's building whithers but this just helps until then.
Congratulations on the filly!
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