More people running dungeons, less wait time.
But yes, I see you point since I didn't mention anything about doing other things while waiting.

I have done Fates while waiting for a DF dungeon but have not run into the issue where I could not accept the pop. Maybe I've just been lucky that I wasn't actively engaged with a mob when the DF pop came.

I don't craft yet, but I've heard complaints about it from people in my FC that while stuck in the crafting window they missed the DF pop.