I will add, I think the Sorcerer should have risks they can take, and maaaaaybe even things that can force them to save vs losing control in some way.
The Sorcerer should be able to risk losing control and blowing up in order to go absolutely bat crap nova, or casting two spells together, or concentrating on two spells, or temporarily splitting yourself into two yous that are both casting spells and whatever but every round your soul is trying to pull you back together and it hurts.
Because you are not a mage. You are magic. You are a living conduit for the fundemental power of the multiverse.