OK, so work around found here:
Last entry has you removing the fills and using a stroke only after converting to curves (As noted on the previous post here).
So there’s a work around. I did this for my design and I’m now seeing my logo import as b-splines. Much better and I can live with that.
As for compound curves/shapes that’s still dropped functionality. Any subtracted space such as any letter with a “hole” in it - DPBAQ and such - all import as a stack of geometry pancakes and you have to go back and re-subtract any negative/hole area. It’s a lot of working around for what should be a straight shot import.
If nothing else - shapr folks need to provide guidance to illustrator/affinity deisnger/inkskape users on how to prepare for export.
And for (whatever) sake - please fix the compound geometry issue!!! We all know how letters and numbers work. And if you need to import complex geometry with a LOT of subtracted geometry this is a workflow killer. Imagine a QR code with a bunch of closed areas for example. Yes, I have a 3d printed QR code for my guest wifi in my house, for example. Clever and handy.
Seriously now, this seems like a real blind spot for the shapr3D community at the moment. The maker community will be importing stuff left and right to print since so much of it is non-serious, fun, goofy, sellable items.