Hi ed, yup these things are on my list to tune up for Sweep - it should not switch auto-place mode on or off when editing the input curves for history updates, and I also want to try a different blending method than the cubic ease-in/ease-out one that it currently uses. I think it should be possible to get some transitions more like Loft when your profile curves are planar at least.

Those things are on my "todo" list already actually.

Currently you can basically override that profile blending by using a scaling rail for the sweep - draw in an additional curve and click the "Pick scaling rail" button inside sweep to specify that as the scaling rail and that will be used to shape the profiles as well.

- Michael