Part of the reason I'm not opposed to this information being ultimately available more broadly is that, for a veteran player, I think at least a good half of it is intuitive.

e.g., if you see a necromancer tomorrow with a Dracolich greater undead (not on the real list -- and now I'm regretting that slightly) and you've been playing CF for a while, I bet you could guess one place to go get it. Maybe it's available three places and two of them aren't as obvious, but I bet you'd know one.

Not all, but I think half or more are on that level of obvious once you know what the possibilities are.