What becomes clear is that the south East was actively colonized by significant populations of migrants from the advanced portions of the Gulf Coast surely because of attractive agricultural conditions able to accept their corn culture.
Add in the thousand year influx from the Atlantean world from 2400 BC through 1159 BC and we have clearly defined bookends between Atlantis and 1492 AD. This is an active span of no centralizing power that lasted 2500 years. We are now learning that significant intrusions took place by at least the Norse and here by the Maya and likely tribes fleeing Inca and Aztec.
The lack of a centralizing power able to protect villages and to establish a land registry made for a different economic geography. Strong village became critical and a decent distance from enemies. All readily available in the South East.
The important take home is that we have a long duration of village establishment and also disturbance in the area including far more peoples and actual numbers than we ever considered.
Origins of the South Atlantic Coastal Peoples . . . the Mayas