Lore attachments:
Asfaloth -- making it give two progress for everybody, but use a restricted slot except with Glorfindel, is a nice compromise. The current one isn't worth the cost on anyone but Glorfindel. Since your new version also requires questing to place progress (weaker, but thematic), the restricted slot is less likely to sting.
Burning Brand -- major nerf, taking a restricted slot (which defenders want), and more importantly exhausting to cancel the shadow. However, major enhancement in not requiring lore! I think this is a good design, but man I would hate the nerf, because nothing makes me happier than tossing shadow cards repeatedly from a branded-defender with action advantage. Good riddance, stupid annoying shadows! However, because of the lore requirement I would happily play this card, with a different name, as a 2-cost restricted tactics attachment.
Another nerf is restricting it to heroes instead of characters. Bad enough that all the shadow-discarders want heroes. I actually think it's a shame that most attachments are hero-restricted, and would prefer if (non-resource) hero attachments instead said "attach to a unique character".
Dark Knowledge -- aside from the limit 1, the ability to discard for a resource makes this card much more powerful and attractive. Removing the -1 wp loses the thematic link to suffering from "dark knowledge", though. Thematically, how about raising threat by 2 for the optional discard instead of using a resource?
Love of Tales -- Limit 1 for this errata victim isn't bad, especially with the enhancement of making it available to any hero. But 1 cost kills this card, which after the errata is usually a coaster at 0 cost.
