The imp.load_dynamic() function is used by third party code (e.g. Cython's pyximport) but is not currently documented. http://docs.python.org/dev/library/imp.html The latest changes to the import mechanism suggest that it should better be documented to give a hint that users can rely on it.
Yeah, they really need to be documented in order for us to document them as deprecated if we decide we really want to remove them later. "Obsolete" is not, I think, the same as "deprecated".
I'm fine w/ documenting load_dynamic() and leaving it as-is since importlib uses the function itself (plus the frozen/builtin functions, although the frozen stuff might be simplified since they can probably just return the bytes for the frozen module instead of doing as much work in C code). But load_package(), load_source(), and load_module() need to go.