Karma is no longer a support, she's a support mage like Morgana... and kind of Kayle. I guess. Zilean as well.
In summary, a utility AP caster. You work as the team's primary AP, but you are used more for the utility you can provide more than your damage output.
Though honestly? I don't even think her current skillset does that. From what I'm reading, she only has ONE support skill and one utility spell which you can find on any other AP caster.