TL;DR
Add ‘Complex’ difficulty to recipe and technology difficulty dropdown.What ?
Add one or two new items to the recipe and technology difficulty dropdowns on the advanced tab of the map generator window. Add a selection "Complex" for complex recipes/technologies and optionally "Expensive Complex" for expensive complex recipes/technologies.Why ?
The "Complex" difficulty is different than the "Expensive" difficulty because "Complex" recipes can have different inputs and outputs and "Complex" technologies may be structured differently.An example of a complex recipe would be the basic oil recipe used in 0.17.59 where the normal recipe for basic oil would be that proposed by FF305.
An example of a complex technology tree would be the technology tree in 0.17.59 where the normal technology would be that proposed by FF305.