- Tier 3 talents are rebalanced - Mastery no longer affects the Eternal Flame HoT. The HoT does tick for more healing. Sacred Shield can be maintained on 3 targets. Selfless Healer will give you a Holy Power charge when you Judge (but Judgement increased in cost) and you can get free, instant Divine Light and Holy Radiances. I like the new Sacred Shield. Selfless Healer looks powerful, but you have to change your playstyle.
- Mana changes - Seal of Insight no longer gives back mana. Divine Plea now has no drawback. You should use Divine Plea on cooldown as soon as you have spent some mana. There is no reason to melee anymore.
- Holy Shock improvements - Holy Shock became cheaper and the cooldown is now affected by Haste. Combined with the change to Eternal Flame, Haste might become the new stat of choice.
- Guardian of Ancient Kings - cooldown is lowered, but only heals the target, not multiple people.
- Glyph of Blessing of Sacrifice - removes the drawback on Sacrifice. This is now a must-have.
- AoE Heals - had their mechanics changed to improve performance during raids. They should still heal for the same amount, but they now heal in a slightly different style.
There's probably a couple other minor changes. I'm probably going to switch to Sacred Shield. I may also try a Haste build and see how that plays. I did like the faster Holy Shocks with T14, and the new changes may bring that style of play back.
There is also lots of new content. I am very interested in seeing how Proving Grounds and Flex Raids turn out.