I genuinely like the Baptist druid. Travelling around the world and giving permanent magical abilities to your friends is a pretty adventurous design choice and it’d be interesting to see how it worked in play. It’d be portable to, for example FR for a worshipper of Eldath, though you’d need to fix the specific sacred bodies of water accordingly.The Path of the Nazirite Barbarian and Circle of the Baptist Druid are enough to make me consider getting this book as a novelty.
I'm also struck that the first adventure seems to be a loose adaptation of the Book of Tobit.
The ranger subclass is really good too, though the rogue one is hyperspecialised and not a good fit for the campaign, and the Prophesy domain Channel Divinity option is wildly overpowered and I’d black ban it.