>I'm in no way an expert on this, but I feel that any approach which over-focuses on the brain - to the exclusion of the environment and physical form it finds itself in – is missing half or more of the equation.

I don't think that that changes anything. If it's the totality of cognition isn't just the brain but the brain's interaction with the body and the environment, then you can just say that it's the totality of those interactions that are computationally modeled.

There might be something to embodied cognition, but I've never understood people attempting to wield it as a counterpoint to the basic thesis of computational modeling.