Part of me wonders what this discussion would be like if 5E had kept the Primal power source from 4E instead of ditching everything. 4E, with its focus on "Points of Light", explicitly made societies of barbarians, druids, shamans, and wardens as examples of these Points of Light (the book "Primal Power" especially focused on this). There was a pantheon of primal spirits independent of the gods. Monsters weren't the only creatures to live in tribes; humans and elves and other creatures did, too.
I'm sure at least some of what was written about the Primal power source, the classes, and the pantheon of spirits wouldn't fly today, but I'm curious what it would look like if done right.