Already on the list. Metasapients from the Sixth World Companion have a Magic of 1 to 6. In previous editions that meant they needed at least a "D" in Magic and could not be Technomancers. None of that verbiage is in the Sixth World Companion that I found. I would recommend using the previous editions as guidance until the Errata gets published. If it's in there somewhere I'd love a page reference.
As far as Mages can't be Technomancers, I do believe the CRB says you have to put your points into Resonance or Magic. Can't split them. And a PC with a D or higher in Magic needs to choose between Adept, Mystic Adept, Aspected Mage, Mage or Technomancer. Pick one, and only one. So the CRB has you covered for the core metas.