You'll probably think that this post is made because I lost to a Lux but no. This is made because I feel, as many Lux mains feel that she's lacking in her shield. However, others believe that her ultimate and damage is bs.
I propose a tweak. Since Lux's ultimate's base damage is already high (300/400/500) and refunds 10%/30%/50% of the cooldown if it kills an enemy champion. Take away, say, 25% of the AP scaling and put it on her shield, giving it a 45% AP scaling.
I'm far from a Lux main (I main Talon) so if there is any Lux main willing to give feedback, do so please.