|Alexander the Great|
I can see these rules being used in a couple of ways. The first is to give your named, historical general some of the character of his namesake. Alexander the Great might be better in combat. Scipio Africanus might get to move a unit after deployment. You would not want to do too much, but even one rule change could add enough character to make a general feel much more special.
A second way to use these would be in a campaign where generals could gain new skills over the course of battles. In this way, a general who survived, would get a higher leadership. Perhaps his command radius would expand. To really get into it you could track the number of times they engage in combat, and after a certain number you could give them another attack.
A third way to use these would just be random rolls at the beginning of a battle. You could get nothing, something positive or something negative. This could be frustrating, but also very characterful as history is replete with as many terrible generals as great ones.
I like this idea as a general sort of wargaming idea. I'm glad that the 1000 Foot General put it in Hail Caesar terms. I'm looking forward to trying this out.