The one thing I don't like about war economy is the idea of a civic to represent it. I miss civ 3's 'mobilization' right now. Frankly I wouldn't object to a civic to represent it in theory, but I have a feeling that the AI would not understand it and would use the civic even in peaceful times, and not realize what it was doing.
So I think we need to figure out something else.
currently, I am looking at:
Barter Economy: (starting civic, upkeep: None)
No Effects:
Closed Economy: (tech: Sailing, upkeep: Low)
+1 hammer from farm
Mercantilism: (tech: Banking, upkeep: Medium)
+1 free merchant, no Foreign Trade.
Free Market: (tech: Economics, upkeep Low)
+1 trade routes, +50% foreign Trade Profit, -50% domestic Trade Profit
Planned Economy: (tech Communism, upkeep High)
+1 Production from each tile with Village/Town/Mine/Workshop/Lumber Mill
Environmentalism: (tech: Ecology, Upkeep: High)
+1 food per farm/fishing boat. +2 happiness with forest, +2 healthiness per city.
Now, to discussion. I'm not to keen on Environmentalism as a civic myself, but as I said replacing it with War Economy doesn't set with me either.
As for Free Market, I really like giving it the foreign trade bonus, as it makes it a more diplomat's civic than warmonger's. It just seems like a cool dynamic, but perhaps +2 trade routes is too much, so I did shift it down a bit.
Planned Economy I really se as the shift of commerce to production to help build a massive juggernaut production base of united workers. I'm unsure, what is your rationale for the food bonus instead of hammers?
I dislike the idea of Mercantillism giving unlimeted merchants because this never seems to do anything for me. so lets go with 1 free merchant.
Closed economy I had no ideas for and therefore cannot really argue with what you suggest

.