Make Lux E damage scale over the duration
Lux E already creates a 350 aoe zone up to 1100 range away thats gives vision and slow for up to 5 seconds. Theres no reason to make it an insta nuke as well. It should be something around the lines of this:
Lucent Singularity MAGIC DAMAGE: 50 / 80 / 110 / 140 / 170 (+ 50% AP) which increases 75/120/165/210/265 (+75%AP) over the duration of 2 seconds
In return the max damage would be highger than the live version perhaps lower its mana cost a little to 70 / 80 / 90 / 100 / 110 MANA
At least then Lux Q E combo would be more interactive instead of landing Q and double tapping E, as this rewards Lux ever more for landing her Q rather than aimlessly throwing her E.
EDIT: PLS NOTE THIS IS NOT A DIRECT NERF THIS IS A SHIFT OF POWER SHE WOUD ACTUALLY GAIN MORE DAMAGE IF USED CORRECTLY
have easier skills to dodge. This could actually create counterplay againts Lux and would separate the good Lux from the bad Lux. Besides if you do somehow miss your E, a 40% cdr Lux ( which is very common) has it on a 6 seconds cd so you can just spam it (not to mention i suggested reduce mana cost so even more spam)