This bothered me for a bit. Why would forests and hills be harder to settle than plains. Maybe it would be possible to divide development of a province into 3 sub categories with unique bonuses and penalties (boosting tax cost 20 admin mp, but boosting production cost 40 dip. cause province has no infrastructure or goods giving cost reduction). For example grain (trade good) + farmlands (terrain type) would reduce the cost of tax increasing development.
This might be good opportunity to introduce new trade goods and find new application for old ones. Instead of having end products in a province it would be better to fill everything with raw materials. For example have hill or any other pasture like province produce sheep or other kinds of livestock. Different types of plants to make fabric etc. Maybe allow the option to change goods produced in a province based on technology. If province can produce grain then it should support some other crops used to produce fabric. Maybe some buildings could add 2nd good produced to a province. Having Grain depot in cotton producing province could generate both grain and cotton (possible with crop rotation technology).
Make max manpower factor in food resources generated too so that there is need to keep some grain, fish or cattle provinces. Hell manpower could also be a development resource.
End products would be generated by manufactures (like Factories in Victoria 2 ^_^ ).
Provinces with forests should be easy to develop. You have supply of construction materials already. Potash or charcoal ash could be used as fertilizer (probably too early in game time frame?). Some raw materials and end goods could be unlocked with technology.
Introduce buildings like water and wind mills. Windmills would be great on hills but also help with marshlands development. Watermills would give some production bonus in provinces with rivers and grain provinces to generate flour.
Creating some easy and simple "industrialization" mechanic in EU4 would probably tie it better with Victoria 3 where old manufactures are upgraded to proper factories (uncivs could rely on manufactures and local artisans instead of getting goods starved).
Having simple economy system in Eu4 with manufactures and deeper development system could be used to generate monarch points or create new development points (capitalism mana).
Another thing that bothered me since DDRJake teaser of English Monarchy in India and Sarig Yogir game. Development penalties to native population. Why would hordes get penalized to develop steppes. Sure steppes potential is not great aside for some pastures but its still there. There are nations that settled in jungle / tropical areas. They also get shafted even when this is where they live for generations. Some global development modifier - we have 75% jungle provinces in our nation so now we know how to deal with them. Something similar to accepted cultures but you cant forget how to work types of terrain if it gets too low % of total provinces.
Did not expect it would turn into long post
