Has anyone played any of the Wargame series, they are cold war rts which use a supply system, and great emphasis on the supply network behind your lines.
The problem of the supply system in the wargame series is that it is incredibly micro-managy, a supply truck will need to be guided from the FOB to the front then guided back to the FOB again, it feels clunky. Suppy trucks are also really vulnerable to enemy fire and the routes they take back to base are sometimes mad (although in this game that would not happen as the move order system is really good)
This game is warfare on a grand scale, it is true that in wargame you can have many units on a huge battlefield, but the scale is still small compared to this.
A General should not have to micro-manage supplies of individual units (a la wargame), his subordinates should be able to do that themselves. That is not to say there should be no supply aspect, I would support a supply aspect as long as it did not require much management and was mainly automatic.