The underlying issue with Creationists, IMHO, is not as much about Creation vs Evolution, as being hung up on the idea of the superiority and Dominion of Humans. They couch their arguments in terms of being anti-evolution, but under it all, I believe their real point is that they do not want to be just another APE.
They are insecure and threatened, and go to rediculous lengths, making all kinds of illogical assumptions, just to avoid being only
Just Another Primate.
Although they claim to take the Bible literally, they easily and enthusiatically accept, even assert, that from the beginning it is only Figurative.
Day doesn't mean Day, it is an indefinite period.
Let there be LIGHT doesn't mean Light was created, just that the clouds parted to let light through. And on and on.
They are not looking at the meaning of words, but rather the emotional content that the words carry. For them, Descent is a diminishing.
You, I and Darwin know that Evolution is not a Progression from lesser to greater or from worse to better, and even if he had used the term Ascent instead of Descent, we would not make the mistake of seeing it as
Progress but rather of
Progression.
The people that today are Creationists, would most likely make the error of seeing Evolution, as you suggest, as Progress. But instead of opposing Evolution, would they be more likely to instead support Evolution?
Their reasoning would still be flawed. But would they still be in opposition?
Aslan is not a Tame Lion