If the shoes are the product why would you want to cover them up, get some legs inside of them n show em off. H
This is MUCH better than the previous work!!
This is homework if I remember right, not a finished product shot that a companies profits depend on.
So there's room to grow. No need for abso-perfection.
Putting feet in the shoes would be tricky.
If you don't use a close to perfect model for the feet, you run the risk of alienating the target demographic.
If you DO add feet, use a mannequin.