rational naturalism is impossible!

[Esquilax]

what features would those be?

The blind spot in the human eye, our spinal system which is maladjusted for life as a biped, our appendix, cancer, the donut shaped brain of a squid, the esophagus that passes right through the hole in that donut, the laryngeal nerve in a giraffe's neck, dew-claws on dogs, wisdom teeth, a dual-purpose urethra...

I could go on, if you need more.

Selection pressure isn't always upward, but it is always downward; the only criteria by which a trait survives natural selection is whether or not its lethally harmful to the organism possessing it.