I didn't see anything with a cursory glance but are they considering allowing Eagle libraries to be used? This would be great but something I would assume that Autodesk would hate.
The library format concepts are quite different, so using them directly probably won't be possible. But there is a Eagle converter somewhere in the sourcecode (although it's not exactly userfriendly) :)
But creating or generating own high-quality libraries is surely the better way forward. See https://github.com/LibrePCB/librepcb-parts-generator