@Meddler, any thoughts on Riot about Lux's state?
I think she really needs help. She's outscaled in damage when comparing to other long range mages like Xerath, Ziggs and Anivia, has worse CC, the E manacost is extremely high, she cant clear waves well, etc. The only thing on her that's really really good it's her shield, it shines on teamfights. But she's outclassed due to reasons I said above.
She needs something. Or a better slow at later levels on her E (her slow its 36%, Xerath can reach 80% while Ziggs can slow 40% but for more time), or reduced mana cost on E (130 mana cost at later levels...), or being able to explode E at arrival (so many kills lost on 1v1 due this), or better base damages, or more mana regen... She really needs something. I feel sad a champion so fun to play is decreasing popularity every due being outclassed (Elise cough cough).