There seems unlikely to be a wait for architectural overhaul.
Architecturally glibc is very nice indeed (downside: the makefiles are
astonishingly powerful... and astonishingly complex, and utterly
undocumented: I suspect that no other makefile on the face of the Earth
uses as many GNU Make features as glibc's).
My biggest hope here is that better docs can be written. Ulrich has a
habit of writing amazing stuff and never documenting any of it in any way
at all except sometimes in PDFs on his homepage. Manuals? Why should they
be updated? (Updates from other people are summarily ignored, too.)