I love the Channeler and think it really hits the sweet spot for a "blaster" mage type. I'm iffy on the druid. If I botch my first Wild Form roll of the day, I don't have much to fall back on. Compare this to other classes, like the Ranger or the Priest, who have multiple abilities and skill bonuses that they can use OR spells.
Even the Channeler has a few spells he can use and doesn't have to worry about never Kinetic Blasting. Sure, the Wild Form is quite versatile, but it's a bit of a downer that you can just lose the class identity with a bad roll.