I think neutral priests of some nature god are more than enough for druids and shamans. I'm sure they are going to get a spell in the final version, that can summon servants (including animals), their turning ability can be used against unnatural things (or holding fey and animals at bay), and their weapons can be limited by their god.
Still, it's an interesting little sub-class and it shows, how easy it is tinkering with DCC RPG. I was thinking a lot about something like this, mostly for warriors. A bit like OD&D's subclasses, eg.: with Personality 17, your warrior can become a paladin, you can lay hands, get some other stuff, some restrictions, and your hit dice is only d10, etc... Plus seperating races from classes and adding sub-races.