I think your umbrella or diffuser worked very well on these, and the eyeglasses were rendered cleanly. The shadows from the flash on 1 and 2 are soft and diffuse, which makes me think you used a small umbrella or small diffuser device, one that really did soften the light nicely. If there's anything to try in the next session, it might be going with short lighting, with her body turned away from the light unit, and her head turned back, across the body axis, toward the light unit. That would give a bit more dynamic a pose,and her body and her face would modulate the light each a bit differently. In all these the head and the shoulder/body axis are in agreement, or matched, which isn't quite as dynamic.
Having the shoulder/chest/body pointing in one direction, and then the head and face turned the opposite direction can add a little sense of tension,or drama, or a feeling of movement, and has other benefits in how it renders the whole person in a flat, 2-D photo.
I guess if there's one thing to note it is that the farther away the flash is, the more crisp the shadows are, as in 3 and 4, as opposed to 1 and 2, where the eyeglass rim's shadow is super-soft in the close-flash shots at the tip, but a bit more well-defined in 3 and 4. Not that crisp and well-defined is bad, it's just "different". On the interwebs in the 21s century, there seems to be a common bias against crisp light, which makes no sense, but that bias does tend to creep in on-line,among some people. Me? I personally like crisp flash lighting. But I also like soft flash lighting too!