Seal of the Crusader (SotC) final damage calculation appears to have reverted to its 1.3 calculation.
Lets examine a weapon that does 50 dps at 3.5 speed – an average of 175 damage per swing.
In 1.3, say you have 1400 AP with SotC up. 1400 AP is normally worth 100 dps. With the 1.3 SotC, it would take that 100dps and use the hasted weapon speed (2.5 seconds) to calculate the extra damage – 250 damage per swing, giving you a total damage per swing of 375. At 2.5 seconds per swing, that’s 150 dps.
In 1.12, SotC uses the original weapon speed of 3.5 seconds to calculate the extra damage – 350 extra per swing, for a total of 475 damage per swing. But you’re still swinging it at the hasted speed of 2.5, so now you’re doing 190 dps.
Expected Behavior: 1.12 SotC
Observed Behavior: 1.3 SotC
For a lengthier discussion on the original changes from 2006: http://wow.allakhazam.com/forum.html?forum=243&mid=1156549053213546157
edit:
There may have been a stealth fix to this issue. If so, current classic is working as intended:
http://wow.allakhazam.com/forum.html?forum=243&mid=1159594457168731649#1