One dimension that struck me as missing: What about indifference? Surely there's a difference in quality between say helplessness and indifference, even if it isn't captured in the win/loss-for-me/you framework.
Many behaviours can be explained by indifference, as it's not obviously right or even rational to think of the Total Humanity Utility as a goal-in-itself. There seems to be an assumption of utilitarism hidden there.
Despite this problem the view described here seems to me to shine light on many phenomena of human existance.