Re: shoes, the problem is that in Vam, clothes wrap to the body. So if the feet have been morphed at all, the shoes deform along with the feet.
In general, clothing fits best on the body type of the model in use when it was imported. If your tastes lie much outside the typical, you may have issues with clothing.
There are some clothing items (dresses and shirts) imported onto models with huge tits, and they don't look right on average chested models. So maybe look for hub clothing items with images of models of the same body type you want to fit them to.