As i don't have ciVI, can someone explain the complete "district system" ?
As i understand, it's like a wonder: built inside a city and lpanted on a hex.
But the building we can make inside it, they use hammers/gears from the initial city or an other city can also build building inside? As some cities can have a district in their "common hex", i didn't see how it work.
Basic jist, districts focus on the general key areas of the game (science, faith, trade, culture, happiness, etc). First you build a district on a hex, the location provides some bonuses to the district depend on what is adajacent (example, campuses [aka science] gain bonuses from mountains).
From there, you can build certain themed buildings which go into the district. For example, you build the library and university in the campus instead of the city center.
So what is the point of districts? Here are a few notes:
1) Makes positional play a bit stronger.
2) Gives you additional points of vulnerability in warfare. Pillaging a district HURTS!
3) Gives you effectively multiple city areas for certain functions. For example, you can build units in the city or in the encampment. You can build ships at a harbor, meaning the city doesn't have to be on the coast to build ships.
4) Some districts actually provides bonuses to all cities nearby, again reinforcing the value of smart city placement.
5) Makes city specialization a bit stronger (it takes a lot of upfront cost to build a district, so its valuable to focus on getting the most buildings out of that district you can).
I think ultimately its a good idea, it just needs a lot of tuning and balancing to make it work. Also...the harbor idea is a good one, but right now there is almost no reason to build cities on coasts....meaning there is little reason to build navy. Issues like that will need to be tackled.