Removal of Armor Penetration

 Feral Druids have been one of the stronger hybrid specs for the majority of WoTLK, and as such did not really need a lot of love. Aside from getting a baseline interrupt for cat form, there was not much in the way of needed utility for the spec. Pulverize is a cute ability that plays on the same DoT consumption for damage and a buff that Envenom currently employs. All in all, there is no reason to believe that Feral DPS will not be top tier unless they are badly hurt by the removal of Armor Penetration. Druid tanks will remain in high demand in Cataclysm due to their obscene hit point scaling and high armor and although they did not receive much in the way of new abilities, they really did not need them.
The changes made to Restoration are curious and somewhat disappointing; particularly for Druids that PvP. Off the top due to the changes to Gift of the Earth mother and Celestial Focus, Resto Druids will be losing 13% haste right out of the gate. Runescape2 Gold that used to be cast able on the Global Cool down now feel sluggish, and direct heal cast time is likewise. There were several talents implemented that seem to push Druids in the direction of tank healing by giving benefits  for casting direct heals. The Efflorescence talent on paper looks like the big raid healing spell, but due to the removal of Improved Regrowth which formerly increased Regrowth and Nourish critical rate by up to 25% the critical strike rate on Regrowth is so abysmally low that this talent is unreliable and inefficient.