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... Well, Blizzard have said that they'd be buffing the current tested bosses up a fair bit in any case in terms of numbers. The tests have mainly been to do with testing the mechanics of the fight. The part that makes them hard gets put in later.
So in the 4.0 patch, we've noticed that a lot of spells have appeared to have merged together (or I hope you've noticed). It also made my last post about unique buffs rather redundant, considering the butchery that has happened to Paladin Blessings. Other than that, this will prove to be a nice post about what the heck's just happened and why that n00b Druid won't buff MotW.
First up, the GENERAL STATS buff:
Mark of the Wild (Druid)
Blessing of Kings (Paladin)
Embrace of the Shale Spider (Hunter - Shale Spider)
+ AGI/STR:
Battle Shout (Warrior)
Horn of Winter (Death Knight)
Strength of Earth (Shaman)
Roar of Courage (Hunter - Cat; Spirit Beast)
+STAMINA:
Power Word: Fortitude (Priest)
Commanding Shout (Warrior)
Blood Pact (Warlock)
Qiraji Fortitude (Hunter - Silithid)
+MANA:
Arcane Brilliance (Mage)
Fel Intelligence (Warlock - Felhunter)
+ALL DAMAGE:
Ferocious Inspiration (BM Hunter)
Arcane Tactics (Arcane Mage)
Paladin Auras (Retribution Paladin)
+CRIT:
Elemental Oath (Elemental Shaman)
Honor Among Thieves (Subtlety Rogue)
Leader of the Pack (Feral Druid)
Rampage (Fury Warrior)
Furious Howl (Hunter - Wolf)
Terrifying Roar (Hunter - Devilsaur)
+HASTE:
Bloodlust/Heroism (Shaman)
Time Warp (Mage)
Ancient Hysteria (Hunter - Corehound)
+ATTACK POWER:
Abomination's Might (Blood Death Knight)
Blessing of Might (Paladin)
Trueshot Aura (Marksmanship Hunter)
Shamanistic Rage (Enhancement Shaman)
+PHYSICAL HASTE:
Hunting Party (Survival Hunter)
Improved Icy Talons (Frost Death Knight)
Windfury Totem (Shaman)
+6% SPELLPOWER:
Arcane Brilliance (Mage)
Flametongue Totem (Shaman)
+10% SPELLPOWER:
Demonic Pact (Demonology Warlock)
Totemic Wrath (Elemental Shaman)
+SPELL HASTE:
Moonkin Aura (Balance Druid)
Mind Quickening (Shadow Priest)
Wrath of Air Totem (Shaman)
-SPELL PUSHBACK:
Concentration Aura (Paladin)
Totem of Tranquil Mind (Shaman)
+MANA REGEN:
Blessing of Might (Paladin)
Fel Intelligence (Warlock - Felhunter)
Mana Spring Totem (Shaman)
REPLENISHMENT:
Vampiric Touch (Shadow Priest)
Enduring Winter (Frost Mage)
Communion (Retribution Paladin)
Revitalize (Restoration Druid)
Soul Leech (Destruction Warlock)
+ARMOR:
Devotion Aura (Paladin)
Stoneskin Totem (Shaman)
DAMAGE REDUCTION:
Ancestral Fortitude (Restoration Shaman)
Inspiration (Holy Priest)
So as you can see from that loooong list, the basic gist of it is that Blizzard are certainly using the idea of bringing the player, not the class. Shamans won't be solely needed for their Hero or BL, as that buff can be brought by BM Hunters or Mages at 85 raiding, with Replenishment coming to Resto Druids, your DPS don't have to go to a sub-spec in order to bring the buff, and so on and so forth. Basically, none of the buffs listed above are unique to any class any more, and while you may not be able to fill in every single gap, it certainly does bring a lot more than we were able to before and you can raid more as what YOU want as opposed to what the raid leader wants.