Here's an idea that recently popped into my head. Here's what it is:
Fullbright: Basically a way to toggle night vision in creative mode.
Phase: Aren't you tired of having to break in and out of a secret area you made? Here's Phase, basically spectator mode for creative, where you can place and destroy blocks, while being able to phase through them.
Yep, that was my idea. Just some things I would like to see implemented into Creative Mode. You don't have to put it in, Mojang, no pressure, but I think quite a bit of people would like it! But, like I said... you don't have to add it.
In addition to what FirEmerald said, why do we need a toggle for fullbright when there is Night Vision, either using potions or commands, or even editing options.txt to set gamma to 1000 or something (IMO this method should be patched to limit it to a valid range as it can be abused in survival/multiplayer).
I can't say the ideas are bad, but... pretty much what the guy above me said about night vision potions. As for the phase thing, I'm on board just as long as being inside of blocks doesn't completely blind you.
I'm okay with this, it would be easy to add a tab or some buttons in the Creative menu to toggle these. Heck I can think of a half dozen more simple toggles like this that would be a big help in Creative.