As a Healer I would love to know if it is worth resurrecting the guy on the ground first or last - as they may have taken ages to accept or decline before, as we all know you cannot res someone else until that person has accept/decline your res. I think this would be difficult to implement in an Addon, but not techie enough so I'm asking.
Also, as we have the ever great Kill Counter, could there be one for the Healer in terms of resurrecting. I would find it interesting how many and whom I have res'd. And would it be possible to record who has res'd you in return.
Healing and Resurrecting are neglected in terms of addons as well as in the game, but maybe an addon could change that.