Your kidding right? What commander doesn't have to treat his subordinates as pawns sometimes, that's the name of the game in war, and its very understandable. The fact that he isn't completely immune, that he has people he cares about, proves his humanity or would you want him to be a cold, emotionless megalomaniac? Does the Emperor even HAVE anyone he cares about?
What he does is logical, viewing his soldiers indifferently in order to make the decisions he needed to make, and even then he grew somewhat attached to the Order after seemingly likely to cut off ties with Ougi in episode 6 because they had grown too familiar and dependent on him. In any event, caring about people close to you and letting their involvement affect your usually sound and clear judgment is what makes Lelouch more understandable and human I think, compared to say Light who really didn't give a crap in the end and focused solely on his goals even after setting up the lose of his father. Lelouch on the other hand, does the exact opposite, giving up the world in order to rescue his sister, and that is what makes him the better man in my view.