One of the prime directives for CDDA from what I understand is some basis on realism. There are some things that strike me as pretty unrealistic:
Crafting CBMs. Beyond the necessary PHDs in biology, electronics, and who knows what else, it would take some very specific tools, and I don’t think a soldering iron would cut it.
Crafting mutagens. Ditto.
Vehicle Forge, and anvil for Weapons and Armour crafting. if it needs a forge and an anvil, that generates huge amounts of heat and smoke, I can’t see how that can be mounted in a vehicle. I think these things could only be done on the ground with constructed, static equipment.
Vehicle crafting. I can see how you could change tires, repair many forms of damage and bolt on plates of armor, as well as all sorts of minor vehicle adjustments “on the road”, but actually adding on whole new frame sections, adding/removing engines, gas tanks, etc would need the kind of hydraulic equipment that is to be found in a garage. It should not be able to be done outside of there.
I appreciate that 1 & 2 are relatively minor changes, whereas 3 and 4 would actually be significant changes to game play (no more “pure” mobile base)… requiring the player to actually have a static base somewhere … but I think that actually could be a good gameplay element.