Here is my 2 cents. I have to make a disclaimer in that I’m a Dutchman, and I’ve never been to America. Regardless, as a Druid, a member of the AODA, and an occultist, I do have an opinion on this matter.
I fully and wholly agree that this tradition, that began roughly 300 years ago in the United Kingdom, needs to keep evolving. I mean this in the most biological sense of the word: It is a living tradition, like a species of animal, that must adapt to its local environment to thrive. If Druidry is a worldwide phenomenon, then, like worldwide occurring species of animals, regional variants will and should come into existence eventually. I believe this is healthy and natural. Certainly, what we practice now differs vastly from the initial orders founded in the 1700’s.
However, I believe that two things are of prime importance. The first is that many of us must still be inspired by the Ancient Druids, as they once were in the Britanniae and in Gaul. We became AODA druids because we were attracted to the traditions the Order has right now. The Welsh Gods we invoke are real. They have power and presence, and are very willing to work with us. Our western esoteric symbolism and rituals have a long history and both power and meaning associated with them. For example; the White Stag of Summer has been a fixture throughout European history. We know the Celts saw white stags as messengers, they have appeared on coats of arms (see the badge of Richard the 2nd), and have played a role in mythology for thousands of years. Something like that shouldn’t be blatantly discarded in favor for something local. I feel the exact same way about menhirs, and I am sure many Druids of our Order have already lovingly made entire stone circles, and some probably used our now traditional rituals to enchant them. There is a lot of established lore there. Sure, they were inspired by the menhirs of the Ancient Druids (or whoever built those sites). But the menhirs and stone circles we make, in the now, have a different basis - the last three hundred years of Revival Druidry. These are our menhirs, with our enchantments, and meaning to us.
One of the key features of the AODA is how modular it all is, and how easily symbolism, animals, gods and such can be swapped in and out, or freely chosen. And we should definitely add our local animal species to work with, but I don’t think this should entail ditching our original connections entirely. Even if we’re all using our own animals and gods in daily practice, we can get together from different continents and use our traditional animals and Welsh Revival gods. I believe this would be the best of both worlds, keeping the internal consistency and shared basic knowledge of the Order, but allowing for freedom and adaptation as well.
The second thing that is on my mind, is that many members of the AODA do have European Ancestry. European history, culture, plants, animals, and traditions have all been brought along to the Americas, and they can never be entirely filtered out. And I don’t think one should try. I believe we shouldn’t denounce our common heritage as Druids, that was the thing we initially all fell in love with - we should definitely take up local practice, consult local spirits, and adapt rituals and customs for local use. But stressing individuality over community seems dangerous for the AODA as a whole, to me. Especially in the Era in which we live. A shared knowledge of Ogham, of the SOP, of the basic Druid Revival tales - this can bind us together. And from that point onwards, we can all develop ourselves into different directions, and ‘bring back’ those things we have found that may be of value to us all.
I don’t see a readily available replacement for menhirs and traditional druid lore that would keep the spirit and effects these have. Not without committing gross cultural appropriation, in any case. To me, it feels like denial of what we are and where we came from. The Ancient Druids are but one thread of our heritage. Revival Druidry is another, much thicker thread. And our local cultures could (should?) be just that, another thread in the weave that makes up our Druidry.
Ultimately, I believe the answer here lies in finding a balance between our own traditions, both as the AODA and as Revival Druidry, which we ought to be proud of, and the new lessons our various locales and their cultures have to teach us.