Originally Posted by Sinx

It's a somewhat disturbing development with how the raid buffs/debuffs are shared atm, as virtually all raid buffs can now be covered by the so called "pure" dps classes (ie. the 4 classes with 3 dps talent trees + warrior, who for some reason has dps in a completely different league than other hybrids).

If we look at the caster buffs in a raid, we get the following:

5% crit: Covered by fury warrior (essentially the highest dps spec in the game atm, and I have a hard time seeing them get nerfed to "hybrid" dps anytime soon)
Burst haste (heroism/bloodlust): Mage (that's the other king of dps)
5% spell haste: Destruction Warlock (already stated by blizzard to be sub par atm, so expect a relative dps increase)
6% spell power: Mage
10% spell power: Fire mage and Demo lock
5% spell crit: Mage, Warlock
8% spell dmg taken: Muti rogue and warlock

So what we pretty much have here, is mage+warlock (which most likely will be the 2 caster classes with highest individual dps as they're the "pure" classes) causing a complete annihilation of moonkin, elemental shaman and shadow priest (replenishment can be provided by other means aswell) in raids, unless the 5% dps taxing system is removed.