If you got all excited about the Healing Stream Totem changes or unexcited about the Power Word: Shield changes on the PTR for 5.3, you have nothing to worry about, Ghostcrawler has confirmed they are simply tooltip changes, not buffs or nerfs.
From the 5.3 PTR notes:
Healing Stream Totem (Restoration) now heals for 83.3% of Spell Power, up from 31 + 42.6% of Spell Power.
Power Word: Shield SP and base absorb reduced by 20% for Discipline. Holy also saw a
reduction, showing the same tooltip values as Shadow priests now.
That said, things could still change before 5.3 drops 🙂