Handle mining & smelting waste (rock, dirt, slag) together instead of individually
I would like to be able dump rock, dirt and slag into a storage together, and move them together in trucks and trains. It is a little frustrating that I need three different storages / train depots to handle what is essentially the same kind of waste.
I could imagine this being a challenge to implement in a way that can be easily understood and assimilated into the game as it is already, but if the devs figure out a way to do that, I would be very happy. Honestly, it would be cool to see mixed storages in general. For loose items like rock, slag, dirt, or ores, you'd need to put them in the ore sorter thing to separate them into coherent belts (if you want to at all). It would also be cool to see mixed cargo in trucks besides when they are loaded by an excavator. That way, you wouldn't have to sort ores before loading the mined material into a train to take to your main base or something. Or you could throw it all in a dumping pile and not have to sort the stuff you're gonna do the same thing with anyways.