Now that coal is a much bigger part of the game why not add a way to produce it by burning wood? In general I would like to see more crossover abilities like this, where a product can be made by something other than the skill it is natural for.
Before someone points out the difference between coal and charcoal, yes I understand the difference but if you are looking for realism then don't play a game which puts onions in blueberry pie. 😉