Structure Variations

Along with randomised structures, many newer structures come with variations.
E.g. Bastions, Ruined Portals, Shipwrecks

The classic structures are missing those.
E.g. Desert Pyramid, Jungle Pyramid, Monster Spawnroom, Swamp hut 
These are mostly untouched since their introduction.

I dont want them reworked as they are very cool, some Variations like differing traps in the pyramids or a mangrove variations for the swamp hut just feel like they should exist.