I would highly recommend listening to the pod cast from S and C coaches James Wilson and Andy Clower. Andy discusses the benefits of bare foot training with a lot of focus on the proprioceptive benefits. For me, personally it provided a clear take home message to try and rehab patients bare foot more often, especially when recovering from ankle instabilities or any injuries in which tactile feedback from the floor is going to prove beneficial.
 http://www.bikejames.com/barefoot-pedaling-flat-pedals/interview-with-barefoot-training-expert-andy-clower/

Adam