I think adding the 1e stuff to DC that we can do would be great. I just don't want to have to change what's already there.
If we have extra stuff, FRUA will still import fine. But, if we change the way DC handles magic, I don't think FRUA will import so well any more. Of course, if we could figure out a way to add illusionists on top of what we already have...
Let's for now, call 1e a worldhack. But, if we can figure out how to implement it without ruining the import of FRUA, then it becomes the default DC.