#1 has the classic "dangling arm" problem. The arm seems to just be hanging there going no where other than to lead ones eye out of the photo. Better is to bend the arm back up so we can see than arm and hand and include it as additional lines in the photo to draw us back up to the face. To me the face seems a bit to sharpened. Neck compression puts some unsightly lines there that could be eliminated by repositioning the head during posing.
#2 is has the classic "flat of the back of the hand problem". The hand in this position takes on too much prominence. It might have been better used to adjust the fabric in some way so more of a side view was presented. The model also looks a bit unhappy. I also find in that type of pose rotating the body more towards the viewer will give a better sense of balance to everything.
The secret of all this is to keep shooting, keep experimenting, keep varying and always keep a careful eye open during posing to any problem areas.