Playtest report :
I think the Healing/Damaging living creatures part of the new turning mechanics is severely unbalanced.
Our good cleric with a few extra turning feats kept a party over-healed across a ecl+4 encouter. THAT IS UNFUNNY.
In a later undead-based encounter, He also out-damaged our sorcerer. (this translates in the awful possibility that a evil cleric can easily outdamage an arcane glass canon). DOUBLEPLUS UNGOOD.
This new system also makes a single feat _extra turning_ the One Feat for the cleric to rule them all. stacking it allows for an endless torrent of positive energy to flow througth the group / negative energy torrent to wither enemies away. Suppress this feat or at least make it unstackable.
This huge boost to the cleric power should be counter balanced, by regressing the cleric's survivability to thief/sorcerer level (d6 hit die, light armor, at best).
Until then, as a quick fix, i'll limit the new mechanic to affecting undeads.