So, I think I came up with a cool buff for Lux...
...without buffing her AP values or level scaling: allow her W to detonate her passive if it hits an enemy.
Right now the biggest complaint about Lux is that she can't waveclear. That's because her passive is supposed to make up for the lack of damage, but Lux has no good way to detonate it on a large group of enemies. It isn't just free passive detonations either, since Lux has to expend an additonal 60 mana to do so, making the total mana cost between 130 and 190 mana for an extra 20% AP and a little bit of leveled scaling. Also no physical AA damage, and it won't be able to proc Lich Bane (if you're into building that on Lux.) Obviously this will require tweaking on her W so it doesn't knock of Banshee's veil like Urf did on Warwick, but I think this is a nice QOL buff that isn't overbearing in any way.
Ideas?