Let's presume these feats existed:
Divine Breath
Prerequisite: Turn Undead
Benefit: You can channel the power of your god(dess) through your being, releasing it in a 45ft cone. This works like Turn Undead in all other respects.
Divine Arrow
Prerequisite: Turn Undead
Benefit: You let loose a laser of divine energy loose in a 60ft line. This works like Turn Undead in all other respects.
Admittedly these are randomly made as no feat should bring up lasers >.>
They would allow clerics to have more finesse in targeting and those who channel negative energy to not annoy their party too much.
Would these be taken by clerics with the same frequency as druids took Natural Spell?
If so wouldn't that be an issue?