TL;DR
Replace the 5 types of logistics chests with a single logistics chest that can operate in the 5 different logistics modes.What?
There are 5 types of logistics chest. They all have the same recipe. They all have the same stack size and rocket capacity. Replace them with a single logistics chest that can stack in the same inventory slot. Then have the behaviour and appearance change based on the selected operating mode, with one corresponding to each current type of chest. Potentially also add a 6th "off" mode so you can have them function as more expensive steel chests (though this is already possible with blue chests).If extra modes can't be added to an item with research, this could instead be a "basic logistics chest" with the red and yellow modes, and a "logistics chest" with all 5. Then probably add a free recipe to upgrade the chests (like hazard concrete).
The transition could be handled similarly to the way filter inserters were done in the 2.0 update.
Why?
Much like turning circuit wires into abstract items, and consolidating the purple/grey inserters into the blue/green ones, this would simplify inventory, logistics, and production fiddlyness. Having to place down 5 assemblers which all take the same inputs isn't interesting gameplay. Having to request all the different types of chests isn't interesting gameplay. Having to resupply because you are out of red chests while you have plenty of spare blues isn't interesting. In 2.0 you can already pretty much get purple chest functionality with a blue chest, just keep going down that path all the way to the logical end.To put it another way this would make chests more like combinators. (there's the related suggestion to combine decider and arithmetic combinators, but let's set that aside)
Why Not
While I have made this suggestion, I still have reservations.Firstly I don't know the technical implications of changing appearance based on operating mode. At the very least, combinators can already do this somewhat.
Assuming that's solvable, I think there are still a couple of reasons people might not want this. We would lose the ability to (implicitly) set the mode using the picker or the quickbar, having to use copy/paste instead. With green/blue behaviour, copy/paste probably brings extra settings you didn't want. The other potential issue is that it will be much easier to break your factory with misclicks (though people mostly seem to manage to avoid accidentally changing assembler recipes).