It would be nice to be able to track favor gains (daily), prestige (daily), KB's and notoriety. Currently there isn't a way to easily track favor/prestige unless you open up your bar and do some math. You also can't add the gains to another window except your combat window and there is a lot going on there.
Something in a window that is customizable to what you want to track. I dislike referring to other games, but something to
http://www.curse.com/addons/wow/reputation-bars would work just fine.