Well, firstly I can promise her head isn't masculine ;-) In my opinion, she has a weak head (that's right, I can admit that her head ain't great). The problem isn't so much her skull (which would be easier to see in person). Her muzzle is weak. Too narrow and needs more underjaw.
Her neck is relatively long, it is well muscled, but I could certainly see how it may not give that impression.
Definitely no roach in her back
A roach indicates an upward curvature of the spine, which Mirada doesn't have. Can't help you on the stomach (I'm assuming you mean her underline). And her loin isn't too short. The opposite actually. She's too long.
With her stomach, what you may be looking at is the pattern of her coat, rather than the actual structure of the dog. You need to learn to look PAST patterns (which can be hard).
To help you more:
decent eyes <--What does this mean? Do you mean size, shape, depth of color?
Tail seems correct <--The set or the length?
Shoulder blades are decent <--How so? Do they look correctly angulated to you?
How is her upper arm? Too long? Too short? Steep/too upright? (for the record, fronts are VERY hard to learn for the majority of people, and you'll usually learn to "see" a front in motion before you see it on a standing dog)
Overal muscle is good. <--Thanks
We work har on conditioning.
That critique was horrible<--Maybe not the best critique, but the point is you're trying to learn. You're not going to get it all on your first shot. It takes a lot of time to learn how to see structure, and how to apply your knowledge of it.