You know, this might be a little off-topic, but all this fun spoiler discussions make me think... is it what the mapper really wants? In my case, I wouldn't really mind if people disabled or not my storyboards. I'd totally hate if they disabled my skin, but the storyboard or Kiai I can see why; just as an example.
So, what about the idea of letting the mapper choose what to disable and what not?
For some gimmick maps it'd totally destroy the joke, and in that case, everyone would still have the same advantages and disadvantages.
Well, I guess that's more of a feature request than anything.
As for the thread... eh, it's already clear enough it's not going to change. Players should already feel lucky the Fun Spoiler feature was added. If people keep whining about it, it might get removed, even.
Even if there's an advantage, it's a very minimal advantage that can be easily overcome.