@Bulletpoint
I like your idea and I think it is as good as if the highest ranking Commander would be playing on map. It is different, but also very promising as it would bring a different emersion. I think also a bit more realistic, because the Commander would rely on the message and reports he get from his FC‘s and there would be a lot more fog of war the Commander has to deal with (also the friendly units situation a bit foggy). The Commander would need constantly reports from his FC‘s about casualties, suppression, enemy movement and many more...
It would of course need players to have discipline.. if they see the commander gives a wrong order, they still have to try to carry it out. But of course they can interpret the order in various ways.
To give even more of a challenge, thre could be a rule that the commander only got situation updates every, say, five turns. That would also mean that the game could be played faster because the commander would not have to get involved every turn.
Just some ideas.