As opposed to the gameplay improvements, these interface enhancements are pretty straightforward, so they will probably be hard-coded in.
- Allow selecting more than 30 units (duh.)
- Allow more than 10 groups (prefixes?)
- Set default behaviour for units
- Better re-grouping
- Intelligent assigning of new units to existing groups
- Sub-group selections
- Customizable hotkeys for everything
- possibility to set rally points on moving units
- show a symbol on a unit, which is the target of a conversion (e.g. empire earth)
- Zoom
- possible options "Zoom in center of screen", "Zoom towards mouse cursor" or "zoom towards selected units" (to figure out what makes sense in which situations)
- by looking at stats it should be clear how many kills were just friendly fire kills (by siege units, deleting idle vills, etc...) and how many were actual opponent kills
- what was the lumberjack/farmer/miner/trade cart composition during game
- maybe a slider in the timeline trend with MIN/MAX values shown
- would be beneficial both to casters and to gamers who wish to improve on their skill
- having a concise aftergame analysis tool would be quite welcome