Divine casters have only 4 offensive spells with any significant utility at end game:
1) Implosion
2) Destruction
3) Blade Barrier
4) Divine Punishment
The max DPS of Blade Barrier and Divine Punishment has already been nerfed in the update. The change under discussion in this thread potentially nerfs Implosion and Destruction.
Nerfing 4 of the 4 significant end game offensive spells given to divine casters essentially converts a divine caster into a healbot. Anyone believing that a significant number of people are going to play a healbot in 2012 is just kidding himself.
These nerfs need to be addressed before the expansion hits the live servers, or Turbine needs to put in place a backup plan to hand out free stacks of CSW pots to melee toons on a daily basis.