I am casual as casual can be.
Got into a group where one DPS left after 2 wipes.

We did the next wipe like 20 seconds into the fight and then beat the hell out of him.
We all wanted it, we all did not want to abandon, the healers did a wonderful job trying to keep everyone up. If someone died - res. No mana left? Let the Bard sing

It was hard at first look, but it is absolutely possible, even as casual, if you find a group, that really wants to do it.

I would not want it any easier.