Nerf Lux shield, buff Janna and Lulu shield.
I get it, Lux has a skillshot shield. But she can't miss herself, and you removed the only thing keeping her to use her W only when allies were around... the double shield only when hitting an ally with it. As a mage who stacks AP and has a heavy presence in midlane, I still question why she has such a generous scaling on her W.
Meanwhile, Janna and Lulu have been hit hard with a nerf stick. It's understandable for Janna, who grants attack damage with it. But it also means she needs to shield allies JUST as they're about to be hit. I can't wrap my head around Lulu though, as she gets a very low duration for a shield with the same scaling. And Lulu doesn't usually buy mass AP items like Lux does.
Lux can shield up to 6 seconds with her W, and shield multiple allies at that. Lulu can shield one ally for 2.5 seconds, and attaches Pix to the champion. But Pix can miss.
I'm just saying, it would be wise to bring Lux's only doubling the returning shield W passive back for much more... balance? Counterplay?
provides an AD boost and can be used on Turrets (why you would want to is beyond me))
provides utility with an on-hit component to the auto attack of whichever ally Pix is shielding/attached to, as well as the fact that before the nerf, lategame you could get max CDR and, provided the enemy never burst down the shield, recast another shield as the old was expiring, essentially making her a lategame shield-bot.