I reject the existence of an all-powerful and all-knowing god if it means abandoning human free will. But does rejecting the god of supernatural theism require the rejection of the reality of god in its entirety? No. But it does require a different understanding of the reality of god and the characteristics of omnipotence and omniscience.
Orthodoxy, which is the unchanged original teaching of Christ and the apostles, doesn't teach free will, it is free will. In the Eastern Orthodox Church (EOC) we are guided, not controlled. We are influenced, not told. We are illumined, transformed, and strengthened by our faith and not extinguished by doubt.
It isn’t that science plays doesn't role in supplying evidence relevant to undecidable propositions. For example, science can lay out the mechanics of the human brain systems that contribute to our making moral judgments (at least two are currently identified, one running off rational assessment circuitry, and another more snap judgment system riffing off our emotional amygdala network).
A group of researchers from North Carolina State University have wired electronics to cockroaches and controlled them remotely from a Microsoft video game console. Using the joystick, scientists were able to move the insects left, right, or straight ahead.