Except that there is really no reason to bring a druid at all, because their healing is not as good as priest and paladin healing. The only thing they really bring is a b-rez that is predicated on (in the vast majority of situations) someone in your raid screwing up and dying.
There is a reason that, despite there being 9 classes in Vanilla, druids generally fall below 6% of any private server's population. That is HALF the amount you'd expect to see (11%) if classes were reasonable good in their own way.
That is the problem with Vanilla balancing. It is "the classes are unique and are each good in their own way" except that they aren't. There is an entire classes that is just worse at everything it can do, and 2/3 of basically all specs sans warrior are non-viable. There is a reason warriors, rogues and mages make up the vast, vast majority of every private server.
It is just bad design. Not uniqueness, not rock-paper-scissors.
This is called "broken".