I think captians, generals and elector counts should be able to issue orders like the imperial guard can. E.g, they can make a unit shoot with an extra rank, or re-roll failed to wound rolls on large targets, or run and get an extra d6" move.
Captains would only get 1 per turn, generals 2 and electors 3, with different ranges for each, e.g 6" for captains, 9" for generals and 12" for elector counts.