The reason I almost always choose druids in the multitude of MMORPGs I play has less to do with RP and more to do with versatility. I love hybrid classes, especially the more offensive ones that can still heal (hello shammie alt!) So when it comes to what's missing from my class, it's hard for me to put my finger on it. Hybrids tend to do so well, but to give them another major ability could water down other classes.
Many fellow druids believe this class is missing some serious crowd control ability, though we have it in limited forms through Cyclone, Entangling Roots, Force of Nature (aka treant pets), Hibernate (beast and dragonkin only) and off tanking in bear form. I'm not sure we need a Priest level AE fear or a Rogue sap. Other players have called for more aggro tools for druids, especially Balance druids. But the class is built to survive a beating and isn't as squishy as those with better aggro management abilities.
I'm stumped on what buff I would give druids, but I'm interested to see what our readers would give their own class. Let's hear it.