Learning about dependencies between Boost libraries is certainly important. I have searched for tools and found one written by YT Kanalseite called Boost Dependency Analyzer in July 22, 2013.
yes, its all or nothing... much like trying to get just one thing out of the .net libraries or any other large package. Everything is intertwined and isolating a tiny piece of it is not possible anymore. It once was, but that was long, long ago.