Chris, the one question I really had about the Sorcerers and Mystics in the 5th Age was, did the new DLCS keep the old paradigms for them that Sorcery only affected non-living things, and Mysticism only affected the living (and the dead)? That would seem to be more along the lines of their spell lists than anything else.
Of course, if you guys didn't keep that, there is certainly room for justification...in Dragons of a Lost Star, Dalamar says the Shadow Sorcerer taught him Necromancy (obviously with the new Sorcery), which shouldn't have been possible since only Mysticism affected the dead.