All the fantasyland dark rides? They (at best) just have you under a roof for 3 or so switchbacks.. with MAYBE some stuff on the walls. While the every attraction in FL is simply a chain zig zag in front of the attraction. I mean.. Toad is probably the most elaborate of those queues.
The Sub lagoon is great in itself.. but that's not the queue, they just ran the extended line around the lagoon. When you are actually in the queue under the train station you can't barely see the lagoon.
As a rule.. queues at DLR are virtually non-existent as a themed element. They changed that when they built WDW and even beyond that they still cheaped out at DLR when they built DCA. I think it more has to do with weather and simplicity and they just think in the DLR's climate you don't need to put people in these heavily themed, inclosed queues. The only real exceptions have been the modern e-tickets.. splash, btmrr, GRR, RSR, RogerRabbit, and too a lesser extent.. SpaceMtn. Even ToT got the shaft when they hurried that project in.