Is halving the value of charcoal remotely enough to go "on demand" for more than the first few hours in a new world?
Too me at least, it just means 2-4 more furnaces burning charcoal, and maybe a few extra cows for fertilizer for my farm, which is might have to be a 5x5, rather than a 3x3. And maybe use more mk 2 provider pipes/modules to cut the amount of entities in pipes if framerate takes a hit.
Seems to me like any nerf big enough to warrant "on demand"-designs for final builds would be so harsh to the early game it would be almost impossible to get started with that first quarry/machine shop. Some other mechanic would be required for that. (Like, say, exploding conductive pipes, or boilers/engines not accepting fuel through pipes...)