As an experienced disc priest (playing it since wotlk), I disliked the way they changed it from a "150%heal + 30%absorb" to a "100%heal + 100%absorb + %mastery".
The point is that in non-combat situations, absorbing effects are useless. This means that it takes you more to fully heal a target because every healing crit proc shields instead of double healing.
Maybe it's battle fatigue that annoys really. But my suggestion was to make Divine Aegis working only in combat states, and in non-combat you just proc the double heal.
Please vote the poll only if you understand this argument.
Mod-note: As a poster pointed out, I will move this to the right forum.