Lux shield is really bad.
So it was said that Lux's shield was going to go out slow and come back fast, that it would take the same amount of time to travel before the change. The shield now takes 3 seconds to leave and return to Lux. It does not return to Lux faster. It takes the same amount of time. Her shield also is going beyond it's range. It's useless in teamfights. Her old shield was better for the team.
180+180 = 360 (.70ap). in a team fight, many aoe's go off and kill lux's first shield, when the shield comes back, boom the next shield takes over. It's how it works. Now its a 220(.40ap) shield for her team mates.
I don't even see an incentive to even level her W, its slow, its bad.
Before you down vote, remember the change is suppose to help Lux's team mates. This is not helping her team mates at all.