Move the necklace up to just under the collar. Bring in the forearms and hands (at natural elbow height) without showing the whole upper arm...the arms are currently lacking...work on the hands so they look like real Egyptian art. Not sure you need "depth" because traditional Egyptian art was pretty flat. Maybe add some wrist bands...consult your historical references for design ideas.
If you like the concept then i'll spend the hours wrapping the body in linen like a real mummy!