Actually... I believe that all the curses will not stack with the new
Deathknight ability, Ebon Plague, which makes the target take 13% more
magic damage of all types.
Bwahaha... equal footing is ours.
^_~
In addition, this particular interchange was very interesting to me,
partway down this page:
http://blue.mmo-champion.com/1/9023610738-raid-stacking-in-wrath-of-the-lich-king.html
Person asking Blue:
Again, I ask you, why not reduce the effectiveness of shaman
utility (and utility in general for that matter) but increase their
personal performance?
Blue: Yes, totally. It works both ways. If everyone is bringing buffs,
then classes that have always brought buffs need to be better at dps
(or healing or tanking or whatever) so they aren't eclipsed. We want
you to have options, and if some specs or classes are just
demonstrably worse, they really aren't an option.
They did say pure classes will maintain a slight edge, but they said
they wanted player skill to be able to overcome that edge at all but
the very highest levels of raiding (i.e. where you assume everyone is
the same skill level).