If they take Thms healing spells away, I will be very very upset

. However I highly doubt, since they named the classes the way they did, they will take the healing spells off either of them. Conjurer gets its name because it deals with summoning the forces of nature, which encompass the damaging force of the elements and its healing force. Thaum.... I really dont know what that name means, but i've done the Thaum quests and they deal with life and death, and revolve their lives around it, so i dont see them taking their sacrificial type heal or their resurrect spell away.
So as far as redesigning the base classes, not so much. But they will be adding White Mage, who specialize in healing, and Black Mage, who specializes in damage.