As for the unwritten WOT material, I would much prefer if Harriet used their content for entries in the encyclopedia. There will be many good backstory nuggets in there - a few of the series's mysteries solved (Tam's backstory, the vileness, the events right before EOTW etc.), and it would also be fun to see a bit how Jordan envisionned the post LB world of WOT... but I don't see why the facts we want could not simply appear as Encyclopedia entries rather than be twisted/augmented/changed by another writer trying to turn barely outlined stuff and notes into a novel). This would not have worked for AMOL - this one had to be developped in full or abandonned, but for the facts to be found in the prequels and the Tuon-Mat stuff, it would be the best way to make them available, IMO.