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

[Moomba33]

It's not gonna happen as Roulettes are there to help people fill queues with rewards for clearing.

This. Amaurat especially needs rouletters to help new players finish the MSQ.
I would love to opt out of ARR content in my roulettes since I find most of it dull now but the reality is the roulettes primarily exist to keep old content alive and doing so would hurt queues.