But “downgrade” is a very subjective term. It is commonly used to refer to scales (downgrading a credit rating from A+ to A, for instance) but in this sense I’m reading it as “not as it ought to be”. That’s fine, but it makes it more opinion than authoritative, it seems to me.
The evolutionary biologists I interact with regularly would certainly not say that they believe in a small or impotent God. I think they might say, more often than other Christians might, that the way God seems to interact with the world is primarily through the natural process He created. They often see this idea of God usually working “through nature, rather than overriding nature” as God being “bigger” to them than if He were to use a constant de novo creation. I think they simply reject the idea that a God who built a universe that can produce humans through evolutionary means is necessarily less than a God that can simply de novo speak humanity into existence.
I think you have a better case on inerrancy, but that is such an ill-defined (or at least, hard to implement) term that I’m not sure if it’s that meaningful.