Multiple controlled personalities
Simply put have it so one person can control two separate military armies exclusively pre-planned in multi-day games. Limit the number of controllable militant powers to 5, a pregame lobby required to pick colors (first person gets first choices, doing picks for colors would just be tedious but automatically gives favorite colors). Make throw a limit to make it up to 60 militant powers per game, pregame show it as <name> then the next line if said person picks it up would be <name> [small number 2 custom character floating either higher or lower or even just a different color] or if you dont think its sustainable over a larger test sample, create a modded template or 3 which you cant change the number of players, only the map and select settings or just the map.
It might do well with MODS but i would think it would be tough to visually inpliment for mods.
Also, unrelated im not sure if the scaling on mobile for paterned player colors was purposely or not but its a great idea, just needs a little tweaking (when you zoom out just right it shows you roughly a big picture of where everyone is rather than small barely visible stripes/designs)
Last but not least for unrelated stuff: Well done with the game.