Spirit Shell For the next 10 sec, your Heal, Flash Heal, Greater Heal, and Prayer of Healing no longer heal but instead create absorption shields that last 15 sec.
While I do agree SS with the 4 set and trinket to reduce its CD is going to be very strong, players WITHOUT them get burned pretty hard.
With current gear a non PI SS is 6 casts. That 6th cast is ESSENTIAL to refresh SS on the first group to give you complete raid coverage with around 8 seconds margin of error before it falls off. With these changes full coverage is nearly impossible with a meager 2-3 seconds margin of error. While this increases the skill cap for disc it will make timing SS A LOT more difficult if boss abilities are on a priority CD like ToT rather then a hard CD.
I'm merely bringing out the quality of life issues of this change and am not even touching the throughput nerf this implies, witch depending on the encounter and dmg patterns I don't believe Disc even deserves.