It didn't change its predictions. The scientific community accepted the new theory once it was supported by evidence. I think you also need to make sure you know the difference between pragmatic materialism and naturalism. As naturalism isn't an ideology of science. It isn't an ideology that has produced any kind of theories.
This is malarkey. Skepticism of atheism is a self defeating phrase. "Skeptical of skepticism" is what it amounts to. The progress was made because they made a discovery. Without the evidence science wouldn't have progressed in that direction. A good example is the creationistm movement now. Its bull and the people involved know it. The evidence doesn't support them.
Who are the atheists scientists that have made theories and then proclaimed them in the name of atheism? What we see is scientists making theories. There is no religion involved. No one states this is an atheist theory or a theist theory. Anyone that dose is usually out for a political agenda and isn't actually producing a viable theory.
Under what logic is it simplifying to figure things out without god? This isn't the case at all. Historically god has always been the excuse to simplify things. Not the other way around. In fact, never the other way around.
As above, a static eternal, steady state, Big crunch universe was nice and simple- it circumvented the need to account for a unique creation event and thus made God redundant-
Hoyle called the primeval atom 'religious-pseudoscience' it introduced many more questions previously considered impossible- how time and space itself could be 'created'
so too classical physics was not simpler than mysterious unpredictable forces underlying them? the 'ultraviolet catastrophe' was so named for a reason.
Many atheists here have argued the point that 'God raises more questions than he answers"
To me any line of investigation like Big Bang, QM, or what lies beyond the superficial observations of evolution, should not be avoided because they 'ask more questions'
that's how we learn.
Hoyle, Hawking, Dawkins all consistently- almost invariably and passionately relate(d) their personal atheist beliefs to their theories when talking about them.
the fact that the world's most prominent 'naturalist's best selling book was called 'The God Delusion' makes this point unambiguous
Lemaitre, Planck never wrote a book called 'The Atheist Delusion'! because science was their focus, not cheerleading their personal beliefs.