Well there's a lot of response to this idea and I don't feel like replying to each individual comment, so here goes.
I see there is a mix of feelings here. Some are for it, some against it, some in the middle, and some don't care. Personally, I just don't really like mages much in general, so there's a bit of bias there. But the idea behind this wasn't to tear apart Lux or make her useless, nor was it make her op. When I made this idea, it wasn't as a buff or nerf, but rather a change to add some diversity to her. I mean, just throwing out E over and over really kind of seems tedious after awhile. There's not really a ton of coordination if you can throw an E from a safe distance and instantly detonate it for harass. This is only my view though, not saying it's right or anything.
I want to ask to all who disagree: what is your idea on Lux? Are the alternative changes that you wish to make? Or just leave her as is? I already heard one person ask for E range to decrease by 100, which might be a potential idea as well. I'll mainly be replying to this thread now.