Nerf Lux
Her kit is only the least of the problem. Support Lux is broken as hell. She spams her e which costs no mana, has no cd so she's doing it every 4 seconds, and it has enough damage for her to solo win lane against an adc and support. Coupled with an enemy adc, you can't even farm let alone sit under turret. Sona was nerfed because her poking made adcing impossible. They nerfed morgana support because her w poke and q stuns were making adcing impossible. They nerfed zyra because she was making adcing impossible. Why can't they give lux the same amount of attention? This is an adc meta for crying out loud. Go in for a trade? Yeah...right. Lux snares you, auto attacks you for bonus damage, e's you then autos you for bonus damage again chunking half your health. All the while, her adc is killing you too. Pick morg? Morg's shield has a long ass cooldown and lux can use e 3 times before morg gets a shield. Not to mention using a shield uses a third of morg's mana. Pick a Soraka? Soraka can only heal one champ and she loses health in doing so, so lux just kills soraka with less effort. Pick another mid laner? Then what's the point in having a support role and what are support champs> Also, that means that your play style will be an either feast or famine and you'll have to play risky which is the worst idea in solo queue. Pick Leona? Leona goes in and lux snares leo while the adc is beating the crap out of her and since she dives in, her adc will get to her aid too late. The only thing that works against lux support is the late game where she can get one shotted by the jungler or mid laner but by then, she's already reduced your team to half health with her ap build. Ban her? Over Trist, Vayne, Twitch, Brand, Nasus, Gangplank, Akali, Katarina, etc. etc? Yeah...right. The 10 ban system should be used to ban the extremes like trist, malzahar, tahm kench who are just overly powered in teamplay while the other champs should be pretty balanced. Let us not forget her fricking ult. She gets her nuke worthy ult every 20 seconds so she doesn't even have to put herself in harm's way to help in team fights.
All in all, nerf her to where she sucks completely as support but no so much in mid lane. For starters, make the mana cost on her e 100 or make the cd on it 10 seconds. The number are exaggerated but you get my drift. Also, remove her double stacking shield to just one and only let it block either magic or physical damage.
