Looking forward to your result(s).
It is certainly worth looking at alternatives I will try something that has just surfaced, in the grey matter,
and if it looks worth pursuing it will be Posted here.
Thanks for posing this task, for me that is what it is all about
This first attempt gives cleaner, but not much different results, by Tools > Lofting:
Tool > Shell was not playing ball with this sharp featured Design, instead apply Transform > Scale 99% to the Inner Body, then Tools > Subtract:
It may be worth experimenting with closely spaced Loft Profiles to give a more controlled appearance.
Note in the Loft the End Faces remain square to the base.
This somewhat regimental but hopefully will convey the idea, the Profile Edges have been left visible:
Profile Height Difference: ________________________Exported as an Image:
Interestingly this regimented Loft accepted being Shelled and provides a much tidier appearance: