I don't know what you mean. What I'm reporting is that "Create a circle, do nothing else, try to place it at a particular location by typing in coordinates, and see that it does not use the center of the circle as the reference point, so your thing ends up offset by [w / 2, h / 2] from where it "obviously should have gone".
"The ability to set..." That's what somebody else already walked me through, I think? It's the fact that it's completely non-obvious and undiscoverable despite being probably what 99% of users want of a circle.
I did not really understand the issue, however aligning objects in Inkscape it is so intuitive (at least I always had this feeling) that I recommend you to try programming graphics with #Metafun
wiki.contextgarden.net/Graphic…
Perhaps this fits better your mindset and expectations... 👍