Syndra is still too weak.
Syndra's core identity was her ability to be blind-picked into any champion because of her strong early game and excellent laning phase. Though Riot claims to "avoid nerfing identities", that is exactly what they did with Syndra.
Even at the time she was nerfed, she was beginning to lose favor because of the assassin meta. And now, in the tank meta, Syndra doesn't do anywhere near enough sustained damage output to make her a serious pick.
She's outclassed in nearly every metric, and wins only about 45% of her games.
She's the only mage I enjoy playing and is in desperate need of a buff.
It would also go a long way if her W bug (the one where it simply fails to work) and her E bug (there are many) were fixed.