If you're after pointers, then with the first picture you might want to start with some study of the relationship between the various parts of the face. Currently her head is a teensy bit small, or her face a teensy bit large. There's also meant to be more skull above the face than you've got. Everything else is stuff you've already pointed out, so I don't think I need to go in to it. When it comes to perspective and foreshortening, you have to try and get away from the whole vanishing point idea, because that tends to distort pictures if used to extremes. You need to try and draw simplified shapes - do them on a seperate sheet if you want - and remember to actually shorten the apparent length of limbs. The size of her feet would suggest that her legs need to be angled more toward the viewer, and "shorter" when measured from top to bottom. If you catch my drift.
Other than that, they're great.
— Piet Hein - Grooks