Wild Growth cooldown change in Cataclysm
This kind of thing comes up a lot, where players see us messing with cooldowns and assume it's a nerf instead of our trying to give them room to actually cast more spells.
Raising the cooldown on spells like Wild Growth and Circle of Healing are good things for healers. It's one of the few* things that will buy you GCDs to actually cast other spells. With a 6 sec cooldown, you really only get to cast maybe 3-5 other spells before you need to hit that magic button again.
Let me put it another way... if there was no cooldown on Wild Growth would you ever hit another button? The frequency with which druids use it today suggests the answer is: not often.