
I can tell you that the LRF file I brought with me from ManyBooks (the Librie' (beta) format) worked just fine. One of the Sony team commented off-handedly that he'd tried a lot of such files and they worked.
Those addons look
very interesting but I can't tell you at the moment, whether they'll be useful or not.
I
do expect a fair number of the old Librie' tools are about to get a new lease on life, and those in particular are ones I'd like to try out.