Smite clerics have a spec DD that is 1350 range, but their spec AE DD is 1500. This reduced range was part of a nerf from DAOC at the time. There are other things people would like to see considered (casting time, damage output, etc) but coming from someone who's main is a smite spec cleric, this single change to range of DD makes the most sense to me.
Cleric Stun - 1500 range
Cleric Spec AE DD - 1500 range
Cleric Single target Spec DD - 1350...
If you wanted to keep this from getting out of hand, keep the non-spec DD at 1350 range. Only reward people with the points in Smite with the increased range (which really brings it in line with every other castable DD in the game)
Cleric Stun - 1500 range
Cleric Spec AE DD - 1500 range
Cleric Single target Spec DD - 1350...
If you wanted to keep this from getting out of hand, keep the non-spec DD at 1350 range. Only reward people with the points in Smite with the increased range (which really brings it in line with every other castable DD in the game)