I feel that much of the point of C is that it's easy to implement. Substantially increasing its scope doesn't seem like the best idea. Perhaps they could do something akin to Scheme and have a "small" and "large" version of the specification.
They have that, to some degree. The standard library is mostly optional. Also, a lot of things are 'implementation defined', so you could just not implement those. That leaves quite a small language core.
