First allow me to qualify my only beef with LW, and this is I will not be happy if they make it a prerequisite to a core spell. As long as it stays in the realm of optional than I don't care what they do with it, cause it wont really matter. Since they made it a prereq in previous beta builds however, LW grabbed the attention of most Priests, hence the large amount of LW threads.
Stay away from the "Well if people learned to use it!" arguments, they are invalid. The fact is that it CAN be misused. Not one of my other healing spells can be used incorrectly by other players. Why should I spend mana on a heal that might not heal?
LW has lots of potential, but you can't push a rope. Regardless of how great it is, if the masses don't like it than there isn't much you can do about it, and it's pretty obvious that the community as a whole hasn't really liked LW for a looooong time. Should & Could have no part in this, this is the entertainment industry. If you want to base things on potential then go play politics.