Aurum Vale difficulty...you don't get book credit if you are dead FUN

[Wicc]

It's just tough because everyone hates that dungeon so much it's only been done when they NEED it.

The only people you'll catch in DF are people who are not familiar with it/being new and don't know the mechanics.
AV is a strong MECHANIC based dungeon.

[RazeLandale]

They tried that. It's called Pharos Sirius. Didn't end well.

I think it'd be fine if you tiered it properly and didn't force it on people randomly. It looks like the direction they're going is each patch has it's own tier in the duty finder. So if they make some harder dungeons and put them all in a 4 star roulette everyone knows what they're getting into. If you want to take it easy on a given day, you don't do that roulette. So long as there's no praying you get brayflox hard and then rage quiting when you get stone vigil hard it's fine. You just take the brayflox tier instead if that's what you want.