#0 - June 6, 2007, 6:54 p.m.
The encounters changed include:
Gurtogg Bloodboil
Teron Gorefiend
Mother Shahraz
The Illidari Council
Illidan Stormrage
Archimonde
Our intent is not to make the encounters impossible. Even with the increased difficulty, I do expect some of them to be quickly beaten again after guilds experience the changes and adapt.
As a side note, the 2.1.1 patch did include the change to the Archimonde encounter that increases his leash distance and made the Well of Eternity a bad place for casters to be near.