My vision was a mix between a FPS where where you have a squad with you that you can order around with say quick wheel actions. Then you could "zoom out" to the battlefield to give more RTS style commands.

One key thing was any of the members of your local squad could be multiplayer real people instead of NPCs and also others could fill out the squads you are commanding.

Then daydreams about a hierarchical command structure where the player in the game with the highest "rank" is the highest in command. His "tactical RTS" view is just controlling say a few platoons but nothing more specific than general orders. Then say each platoon would have a commander (highest rank again, etc) who would have to implement orders from above using both his FPS view or using his tactical RTS view which now let's him control squads. Then down the line a squad commander who can control members of his team and so on.

I think it would be a bit rigid and I know of games which check off a few boxes but I would love something like this.