'Sunwell Radiance' is a buff that reduces your enemy's chance to dodge by 20% and increases hit by 5%. Apparently, Blizzard has implemented every mob in Sunwell Plataeu to have this buff. So, if you have been a tank and noticed your dodge drop from 50-60%~ to 30-40%~, this is indeed an intended change. Blizzard may have put this change in to compensate for the amount of dodge/avoidance that was given on T6 gear and also keep under geared guilds out of Sunwell Plateau a bit longer.
There has also been confirmed reports via WWS(WoW Web Stats) that tanks are consistently dodging 20% less than before.
A statement on wowhead.com from a frustrated tank
"I noticed this gimmick on the very first pull in sunwell. I can tell you that this is a game breaking change for all sunwell tanks. Why couldn't Blizz design a working tanking mechanic instead of grossly patching our horrible itemization with a nerf like that. Sunwell Radiance basicly cut 25% of our avoidance. That is the equivalent of retrograding a T6 tank to pre-kara level.
The only benefit from it that I see is the reduction of rage starvation from extreme level of avoidance. But how do you expect our healers to react to this? They are used to heal 55%~60% avoidance tanks and now have to deal with a 30%~35% avoidance tanks. This change is unacceptable to me. To counter this, we now have to wear insane amount of avoidance. Gear setup that is rediculously useless outside of Sunwell."
Source: WoWHead.com, WoW Forums EU
WoW - Former Guilds / Teams
-Captain of x6.WoW (Check-Six) during WSVG
-Played for Fnatic.WoW with Insurrection
-Co-Founder of the Eminence Guild on Blackrock
-Formerly Trance of Tichondrius
-Current Guild: Vicious Cycle of Blackrock
-Founded CAL-M and CAL-I team |e| (Team Element)
-Founded CAL-IM team V7 (Violent 7)
-Went under the nick 'sHadEz' in CS
-Former member of team W.E.W. (Weekend Warriors)
Starcraft / Starcraft: Brood Wars
-Founded the Guild [e]lement on USEast
-[e]lement held a 70-21 record in unofficial guild matches on battle.net
-Team [e]lement was the original guild of team USA players 'Saddles', 'Nooks', 'Tempest', and 'Nony'.
- went under the nick 'shad[e]z' or 'shadow[e]'
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