Druids are one of those classes that have always been sort of stuck between a rock and a hard place, as far as balance is concerned. That is to say, when a developer gives them offensive spells that are too powerful, they are accused of stepping on the toes of wizards, and if they are given too powerful healing/buff spells they are accused of turkin' da jerbs of clerics. But I suppose that in a primarily single-player game like P:E, that wouldn't be so much of a problem.
I remember in the original Everquest, they were positioned sort of like a reverse necromancer, as far as gameplay was concerned (not lore-wise). In the sense that both classes had a lot of snare and DoT spells, but necros had a lot of debuffs and lifetaps where the druids had buffs and heals.