Something that kinda bugs me about these topics, is a lack of "references".
*So for anyone interested to see "what" was changed, see the attachment.
If you're looking for comparisons to other spells, on other champions that are similar in nature.
Feel free to check out these links to:
~ Bard's "Cosmic Binding": http://leagueoflegends.wikia.com/wiki/Bard
*If it hits 2x targets, it stuns, rather than just slows them.
~ Morgana's "Dark Binding": http://leagueoflegends.wikia.com/wiki/Morgana
*Is her single target stun as good as Lux's double stun?
Here's Lux's page, scroll down to compare the stats/costs/ect on her "Light Binding":
http://leagueoflegends.wikia.com/wiki/Lux
Of course, there are many other champions with similar abilities, so feel free to check out the wiki and go nuts ;3
Just make sure that if you want to see Lux "adjusted".. you should base your reasoning on actual facts/logic, rather than just her "pick/win rate".
IE: Why is she better?
~ Is it her dmg?
~ Is it her CC?
~ Does she just simply lack counter play?
ect.