so I figured out that the stickerapp editor now works like this:
the larger the chosen dimension of the sticker is, the sharper and more detailed it will generate the contour for your die-cut stickers. Not sure why that is. Once in the editor, you can downside the sticker without the contour changing shape.
I have no idea of any of this works the way I want it to, but we'll see in about 2 weeks or so how they came out.