Cleric would have got more healing power than before, but the class needs more change about healing.
of course, Cleric has surely higher positive power, but this doesn't mean they can heal allies stably. They're even a bit more unstable than Favored Soul becasue of their difference on SP, even if they have healing aura - having Healing Aura doesn't mean Cleric has stability about heal. Healing Aura SLA forced to them to be next to allies to heal, who are near mobs attacking them. This is dangerous, so can't be said stable. so they should be able to use more healings not by healing aura.
Yes, difference of SP between Cleric and Faverd soul is matter of course. So I'd suggest a thing on Pacifism, Second Core ability of Healing domain, which would be less-useful at higher level because the effect is not good currently. Put this effect into Pacifism; "all cure spells(or all healing spells) have 10% less cost of SP to cast when Pacifism toggled up." of course, Pacifism still will have some penalties(currently, -50 Spell Power and no crit on non-positive spells, and -1[w]). plus, pacifism will need to take cooltime to turn off and on, or something, to prevent them to change their position often - healing then attacking then healing then attacking in a row.
Then Cleric would get surely more powerful and stable on ONLY HEALING with untouching offensive powers, as developers intended.