hi there,
and yes after the bag designs the shoe designs, I find it quite interesting in the sense the shape from one model to another is practically the same especially for dress shoes which must be a bit formal, the main thing which changes is the shape of the toe box, therefore most of the designer work is to show how the leather parts are going to be sewn together and what will be their shapes to achieve a nice and elegant result.
Also shoe is a very good proportion exercise for people who like to draw as it is something we are all familiar with, it is easy to notice ourselves whether it is completely out or rather correct.