Asynchronous Multiplayer

I propose an asynchronous multiplayer mode that would allow players to setup up a game and then manage their empires at their leisure without the need of other players to be online.  The purpose of a game mode like this is to allow players than have trouble coordinating the required free time with each other to be able to operate independently of each other while still competing in the same game.  A secondary purpose is to allow people who want to go into great depth micromanaging their empire to compete with others without frustrating them with long wait times.  

The idea is that once a game is set up, all players can complete their tasks whenever they have time and inclination and without the requirement of all other players to be currently connected.  When they are done with their tasks, they submit their actions to the server.  When everyone has submitted their actions, the next turn becomes available.  Players would be notified of the availability of their next turn through their communications method of choice (Steam Message, IM, Email, text, dedicated phone/tablet app, etc.).

Granted, battle and diplomacy would need some special considerations.  Their could be options that notify involved parties of their requirement to be online simultaneously to complete such actions.  Alternately, automatic battle resolution could be forced (this should be an option) and diplomacy could simply require multiple turns as terms are negotiated.

Related, but on a side note:  It may be beneficial to allow for players to script their battle plans for automatic battles.