#4 Extensive Hotkeys
One should be able to build every building with hotkey's, and when a building is marked you should be able to build every type of fighter/people. And hotkeys to mark people/building. Here it is maybe good to seperate military/civ and unit/building. So a combination of the military-key and the unit-key wil select military units. A "all" key is also a good idea. So a combiantion of Military-key, building-key and all-key would select all military buildings on the screen. But maybe it is a better idea to have that as default, and instead have a "one" key (to tab through individual units/buildings)? When you have selected different buildings you should be able to build units from both buildings (e.g building options from both builings should show on the right side). Combined with uniq hotkeys for different units you get a very fast unit production: Build military builings so that you have all types in one screen - Select all military buildings (with hotkey) - Build all kind of units.
