Support vs Mage Carry

This is a much-needed brainstorm thread on Sona, who currently isn't working as a hybrid-support, since she has capabilities as botha poke carry and a sustainer, but the sustain part is being suppressed for unknown reasons. I'd like the opinion of the masses on whether Sona needs more number shifts or a Sion-level rework? If we are going for a rework, I'm trying to cook up a kit that makes her more combat AND sustain oriented for herself...that's right, I feel the need to abandon her "Supporting" piece for a better carry role.