not sure what the fuss is all about, she's a ap combo based nuker support ith a Karma-esque kit, which is nothing we havent seen before. she has a ss nuke, a speed/slow, a shield (im really tired of shields in this game, tbh - it feels like lazy kit design - but ill cut Riot a break here because she's support, I guess. Still would like other support abilities than shield).
She should be viable because of that ult though, and fill a kind of anti-Janna role, where Janna is a support that can stop initiation, here we have a support that looks like she will gave god tier initiation. We shall see. Hoping for good ap ratios so I can play her lux style support.