You could be right about that, I don't know too much about Pelagius myself. I did see a video recently with Leighton Flowers where he had a scholar on who argued that Pelagianism as often construed by Augustine was a myth.

I guess the meaning of that could change depending on what we mean by perfection. It is related to original sin, though: without original sin and with free will, one could conceivably live a sinless human life.

I'd agree with Pelagius here, but isn't the central problem of Pelagianism the claim that humans can achieve human perfection by their own free will?

It's true that it's the more dominant theory, but in my reading I've found it's more often assumed rather than justified. Maudlin makes this point as well.

Especially under the pandeist variant. God changing and limiting Himself in order to create the world only makes sense if He loves the world.

For example, the kalam I think ends up committing the atheist to B-theory, whereas the logical problem of evil is problematic for certain notions of God more than others.

I agree that they are by no means definitive, but I do think they point us in the right directions, or at least reveal something about our entailments and commitments.