Scientifically man is perfect we age because we lack enought anti oxidents and we rust to death. The proof is animals like mice age faster than us. If you swapped human genes in a mouse one could petential live 80's years. If you eliminate birth defects or simply abort the defective fetuses which the body is programed to do naturally anyway you can have eden today.
Perfection is eugenics and pharamacology. If we knew the chemical formuals and had mastery over bio engineering building a relatively immortal man is easy. Note most of genesis is myth. Such as animals not eating meat. And the garden was not a natural paradise for all life just humans. So it my have sucked for other speacise or was just as violent or chaotic as the rest of the world but with more accessable food.
Being perfect is just a side effect of "evolution" anything that servives to reproduce is perfect enought. Look a roaches how can you buil a more prefect animal? Long lifespan is the only awnser I can think of and that is kind of easy to do but sadly this technology may take 500 years to being to master and that is expecting a constant increase in knowlege we could hit a dark age and be set back thousands of years.