There has been a lot of doubts about the latest changes to healing, so as someone who has been involved with it from the beginning I am stepping ahead to address most of your doubts and concerns about the matter.
HEALING NERF UPDATE: WHAT CHANGED?
Back during the vanilla stage of progression raids and dungeons had a healing debuff applied to players that would reduce their healing output by a given percent. This debuff worked in a similar way to any other healing reduction aura e.g warrior's Mortal Strike.
When we moved to TBC the system was redesigned to allow better management and flexibility - it no longer relied on an aura, or spell, so it could be conditioned and changed as we pleased.
With this redesign the healing reduction was applied directly to the healing formula before any modifiers (spell power, % done bonus) took place. In other words, it only affected the base healing output from the abilities.
With the latest update however this has been corrected, so now the healing reduction is applied after the total healing value is calculated, in the same way it was done back during vanilla.
You should consider that this gives you the same effect as from let's say Battleground Dampening, it works in a similar way, but inside instances. The more spell power you have, the more you will notice it taking effect.
This change was supposed to air back at the Tempest Keep: The Eye "pre-patch" thread, but since the changes were still experimental and the latest tests had reported no changes to them they were left out of the announcement.
BUG FIXES: DRUIDS AREN'T AS HOT AS BEFORE
During one of the many tests done to address this issue, we have identified that the healing reduction was not being carried over properly to "healing over time" abilities. Those abilities were completely unaffected by the last test performed by me last week.
This is one of the reasons druids were so overpowered in comparison to other classes, so this bug fix should put them all at the same ground of competition.
CHEERS: HEALING NERF IN KARAZHAN AND DUNGEONS BEING LOWERED TO 20%
As a dear friend once said, the community comes first and what the community wants should be our goal, given that it stays true to the purpose of providing a fair and enjoyable experience to everyone. After listening to many of your complaints about the healing nerf and how heavy has it been to entry level instances and dungeons, we have decided through a democratic discussion to lower the healing nerf values in Karazhan and all of the Outland dungeons (5 man normals and heroics). You have asked for it... and we agreed that is reasonable, so here it is!
We plan to leave the current values for Gruul's, Magtheridon's, Serpentshrine Cavern and Tempest Keep as they are for the time being, but that is a matter we may be revisiting once enough data is collected now after those fundamental changes to the healing reduction system.
Those updates will roll out at the next week's routine maintenance.
Let me know what you think about those changes and if there are still any doubts about them in the comments section bellow.
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