Definitely a cooling/heating system. That would be excellent. It would also be great if the nest was set up with modules that can be easily removed and swapped, so if you want to quickly grab brood from a section you can simply remove it, or if one gets too dirty, you can swap it out with a fresh module without crushing or having to rapidly seal the exits from escapees. Also, a watering set-up like a Tarheel ants nest, but with a larger reservoir and some way to check the water level, like a floating meter or something.
It would also be very nice to have multiple entrances/exits to the nest, to A. connect more modules and B. connect/swap outworlds. The outworlds themselves should have nice big hatches with proper sections specifically designed for fluon or other barriers. I also think a plate embedded into the floor of the outworld would be awesome, so that way you can remove the plate quickly if it gets dirty from food. The outworld should also be designed so that the opening hatch is part of an ant-proof lid that can be removed for cleaning. The outworld's floor should also be made from a material that doesn't absorb liquids, preventing stains and making it easier to clean. ALSO, having a fan hooked up to one of the sides of the outworld would emulate wind effects in the outdoors. This would also compensate for the lack of absorbing substrate in the outworld, as the wind would dry things out quicker.
And also, forget to mention, we should really standardize tubing sizes for connecting outworlds and formicaria. Or just do away with tubing entirely and go with a simple formicaria-to-outworld adapter/connector.
Actually, I may just build a model of all this in Blender and submit the drive file here to formiculture. It's probably difficult for everyone to picture this no doubt.
So there you go! All my frustrations with current set-ups boiled into one. If you could build an all-in-one set-up like this, I'd definitely buy it!
Manica invidia (1 queen, ~200 workers)
Manica invidia (1 colonies, 1 queens plus 3 workers)
Lasius niger (single queen, ~200 workers - naturalistic, predatory set-up)
Lasius americanus (1 colony, ~10 workers)
Tetramorium immigrans (3 colonies, 3 queens, ~ five workers each | 1 colony, 1 queen, ~1200 workers)
Formica aserva (aserva queen, ~15 ​Formica neorufibarbis workers)
"And God made...everything that creeps on the ground according to its kind.
And God saw that it was good." - Genesis 1:25