I tried to put in a ticket, but it was directed to the community forum instead. If you like this idea and want to see it added/fixed, be sure to thumbs up this post so the developers can see that this is a highly requested feature.

If you have a convex part you want to taper, you can typically use the BENDING token with a radius, direction of the bend, and a taper angle to create this effect. However, if you have a concave part, you cannot use this token in the reverse direction. For example, inputting negative angles in the taper field of the BENDING token will not change the bending angle of the part beyond 0 degrees. A larger angle than 90 degrees will also break the part and cause it not to draw. A fix to this would be to just rotate the part and offset its height to effectively mimic what a concave tapered part would look like.