there are things that bugged me about the resource system. For example in vanilla civilisation 4 cows give +1

like in C2C. But why get you extra health from cows ? you can eat the cow drink its milk ore make clothes out of the leather ,thats the reason why. But this recources exist in C2C but don't give bonuses ( ecept the gold bonus from markets, shops etc.). The result is that cows as a resource are valuable while the manufactured recources which resulting out of cows havent any real worth. The smal gold bonus don't count for me. the question is now, why should i produce all the manufactured resources, when i already get their bonuses from cows itselves?
i suggest that we remove the +1

from cows and give +1

to milk and +1

to raw meat and so on. the player would have more reasons to produce this resources and they would be more valuable for trade. So trade would have a bigger impact on the game. Fact is that with the bulk of recources we have in C2C, its unlikely to have more than one deposit of every one and you cant trade with just one deposit.
the second thing is, why provide the factories bonuses like health and happines while the products they produce don't provide this bonus? for example the perfume maker. this workshop gives you citty +1

and +

, while perfume itself dont give any bonuses. WTH i mean perfume smells good even if you havent the producing workshop next to you. My suggestion is to remove the bonus from the building and give it to the resource.
if we apply this sugestions to every resource we would have a more realistic resource system with real trade.