There needs to be a way to remove dungeons from roulette?

[PyurBlue]

It's far more likely queues would become unbearably longer for certain dungeons than increase. If you could veto five dungeons from Leveling, I can all but guarantee which ones would be picked.

What if you couldn't pick 5?

And therein lies the problem. Four of them are story required, which means new players could be waiting hours. Amaurot would have a similar problem simply because of the ilvl sync.

There are ways to get around this, I mentioned one in the second half of my quote. It's really only a problem in your example because the number of vetos you used is enough to cover all of the most unpopular dungeons, and that's assuming the dungeons you listed really are the only ones people would avoid. As with the Alliance Roulette, players will queue for leveling expecting different things. Some people only care about getting the reward, they might choose to skip The Vault or Doma Castle over Sastasha and Copper Bell.