Disc Priests are receiving a MAJOR CHANGE. No more Shadow Mend (previously learned at 18, now at 28) and loses Plea ( previously learned at 7, now at 24) which means no more mana-efficient, mobile healing/ topper-offer, leaving Penance the only heal to be able to be cast on the move. Loss of Shadow Mend is a HUGE loss because you can get kicked/silenced from the Shadow School and still cast PW:S, Plea, Penance, or Smite, or get locked out from the Holy School during Penance and still spamcast Shadow Mend, which is why Disc Priests were so OP in the first place. Disc Priests will essentially be down to one heal (Flash Heal) and PW:S and Flash Heal is much less powerful than Shadow Mend. Loss of Plea is also pretty impactful because each Plea heals for ~600 hp? and could be cast on the move. Plea as a level 10 disc priest could pretty much carry bgs if you knew how to use raid frames/healbot/vuhdo/etc.