The Unknown!

[Felis]

That's not the point, I don't see why they have to mark everything, I hope they do but they probably wont, that's why I'm asking for it.

Only quests would be marked with "!". Everything else (like the Behest NPC) not.
Do you remember the last invasion event, where you got some pages? Nowhere in the event was mentioned what to do with the pages. And then there was the NPC who gave a vaguely location where Urianger would be.

i'm sure in 2.0 there would also be events where you need the forum to know what to do.