I agree. Delubrum Reginae, and to a lesser extent Castrum Lacus Litore, do a poor job at conveyance of mechanics.

Eventually Delubrum is going to need a nerf anyway, though. Maybe not to damage or mechanics but certainly to boss health. The Queen especially is balanced around the idea that the raid is using damage essences but people rarely use damage essences already and will do so less and less the more outdated the content is.