There needs to be an official forum for standard villager gather rates and percentage increases of each upgrade with sufficient explanation of each technologies.
Likewise there needs to be both a standard countering system guide as well as advance countering systems.
Like for example how to counter men at arms in feudal age? How each military formation is beneficial and not beneficial. How do scholars reduce the research time of the dehli techs (the complete table).
There shouldn’t be any secrets to the core mechanics of this game. IMO.