One issue with this. What do you do with verses that indicate a human may not be considered an adult until 200 years of age? I can give one a point that the earth may not be strictly 6000 years old, but how does long life fit into the narrative of evolution? Normal brain development is considered an attribute of life, not that it takes the brain 200 years to evolve. Nor does it explain what humans did sitting around for hundreds of years waiting for their brains to develop. A 3 year old is not the issue. A 70 year old that still has a modern brain of a 3 year old would.
We have issues viewing a mature 30 year old as a newly created being. Adam would have been a mature 250 year old when created. Why would it be neccessary to state all humans before the Flood were examples of human evolution? Either they lived very long life spans or the Bible got it wrong. Adam and Eve other than one spectacular event did not even measure up to the rest of humanity metaphorically or literally.