OK, I read through the book a bit more last night and it seems to be pretty good. I had originally said it was like Warhammer d20, as Warhammer is also turn-based game based on units that can include powerful characters or monsters. Actually, a better comparison would be something like the PC strategy game Medieval Total War (one of the few PC games I know, so don't ask me if it's like Game A or Game B)
I still will have to give it a more thorough reading, but I do like some of the ideas in the book and how they went out integrating d20 and mass combat, and the awarding of values to units seems to be pretty fair. I'll have to read more thoroughly how they integrate weapon size into combat (i.e., historically, a unit with long weapons like pikes is designed primarily to fight cavalry, while a unit with regular weapons like swords is designed to fight units with long weapons so the cavalry can take out the opponent's sword & archer units)