Revert the Syndra nerfs
Look, I get that she was OP, but that was before Edge of Night. Since Edge of Night was introduced, she has been completely and utterly useless at every level of the game. Her early game is garbage, her mid made is game, but her late game is an active detriment to her team.
She needs buffs, and she needs buffs bad. At this point she is almost as useless as Lee Sin became after his nerf (I mean seriously, he NEVER wins anymore)