Hey, I hope you're still working on this! I have a feature request.
I'd like to use this for patterning out metal armor for smithing. However, the papercraft-based output is not very helpful for that. What would be incredible is being able to join certain faces together (rather than having things split up quite as much as they are) in the software, and then output that entire face as a vector file. From there, people who have plotters can use the plotter to draw the pattern and then work from there.
Or, for a different approach to tackling the same problem, being able to unwrap a very large portion of a model (for example the entirety of a medieval breastplate) at once would be best. Taking a complicated 3d shape and making one contiguous 2d shape from it. Medieval armor is not nearly as complex in terms of surface adornments as scifi armor reproductions are, so this works pretty well.
I hope that makes some kind of sense. I can draw you a picture if it doesn't!