Yeah, certainly always room for improvement - each of us is getting a bit better at modelling and texturing with every model we do, so by the time we've done every model we can think of, we go back to the start and improve everything, forever in beta :-)
Boots would be a really easy addition - the texture actually has a "boots" part on it already, in the same position as Combat Leather Jacket did - so can just add the Combat Leather Jacket boots and apply the texture to them, then adjust them as needed.