As a healer, in some fights (especially in Hyjal) I lose track of my targets. In Grid or the MT targets I see people losing hit points and I know I should heal them. When I select them in Grid I often manage to spot them because of the highlighting of targets in the regular player UI. But if they are behind me or hidden behind some other players / mobs, I might not be able to detect them at all. If they are out of range I do not even know which way to run to their rescue.
So what I would like to see is an addon that would simply display an arrow pointing in the direction of my selected target. Perhaps an approximate distance could be usefull as well.
can't you get map locations for party/raid members? for healing that's all you need, not a general location of any target.
i would think a simple mod to highlight your current friendly target in the minimap would do the trick. if the target is not in range on the minimap, either zoom out to fit or put up an arrow pointing towards them.
you can not get coordinates in dungeons. you can get close by using some sort of minimap ping approach check how VoidReaverAlarm does it but every member in your raid would need the mod and they would need to constantly broadcast their location (not really something i would want to do during a fight) to much syncing and other addonspam going on as is