Grace: Ah grace, another talent that really needs looked at. It's cool that Blizzard made grace affect more than one target, however, the mechanic of grace in itself is clunky and frustrating. I get it, they don't want passive +healing talents, but it's talents like these that are hindering buffs to give us more throughput. Honestly Grace in my opinion is terrible. Its good for the purpose it served to begin with: A tank healing mechanic, but it does not serve the purpose of increasing our raid healing throughput. It's overall in my opinion, hindering any buffs coming our way to increase our raid healing potential.
All in all, with the inability to make use of Power Word: Shield due to its mana cost, it really makes you question the intention of making all these talents tied around Power Word: Shield. If Power Word: Shield hinders your mana, why is there Renewed Hope, Strength of Soul, Borrowed Time, and Rapture?
I urge Blizzard to take a look at the discipline tree and their actions to see for themselves why what they did to solve the "Power Word: Shield" spam was awful. You've basically broken the whole purpose of the discipline tree and people as we speak are already going back to Holy.
Nerf Absorption + Mastery Rebalance: Why didn't you just nerf the absorption a tad. Say in my gear, the shield absorbs 24-25k in mastery heavy gear. Absorbs 20k in PvP gear. To balance this, I'm sure it'd take a slight reduction in Power Word: Shield and Mastery balance all together.
Buff Prayer of Healing somehow to compensate this nerf: Since Power Word: Shield is no longer usable to pre-shield raid damage, were pretty much left with only one other spell to heal raid damage, Prayer of Healing. However, Prayer of Healing in itself currently isn't enough.
Grace Affecting Shield Absorption: Have grace stacks affect the shield to absorb more. This would make it so they could tone down Power Word: Shield, but also not harm PvP, where you should keep up grace stacks on your partner you're going to use Power Word: Shield on. This also ensures tanks have a more decently size shield as opposed to the raids.
More Problems With Shield Cost increase:
Mastery: Due to shields no longer being used as much, this lowers our need to use mastery on our gear. Mastery really only benefits two things. Divine Aegis( Which is usually wasted anyways) and Power Word: Shield. Because Power Word: Shield is just mana inefficient, we all just result in using prayer of healing more and favoring haste over mastery in this case. If you want us to use mastery, give us an incentive to use it.
Knee-jerk changes done by Blizzard:Rapture now returns 2/5/7% of maximum mana when Power Word: Shield is consumed, up from 2/4/6%.
This in actuality does nothing, it helps our mana abit, but it's hardly a noticeable difference.