Lux currently has one of the highest winrates
Strong Wave clear: With Lucent Singularity (E) and Final Spark (R) you have really solid wave clear on a short cooldown, not to mention the safe distance!
Good Blind pick and Safe Laning: While Lux doesn't do well against every matchup, she can survive against most champions in lane as she can simply stay back and farm if she has a tougher lane opponent.
A very strong and underrated Shield: Prismatic Barrier is probably the most overlooked part of Lux's kit, but a very strong tool. Not only does it shield you twice, it is extremely strong in a teamfight if you can land it on multiple teammates.
Where are nerfs?