When stitching photos to make a panorama-style image, parts of the image are invariably lost at the bottom, top and sides due to irregular boundaries among the files being stitched. The Lightroom CC 2015.4 (not the standalone version) released today includes a capability that automatically fills in the space that eliminates the need for cropping so long as you are comfortable with the composition. The choice in Panorama Merge is called Boundary Warp because the boundary is warped to fill in the empty spaces that would otherwise have to be eliminated by cropping the final image. I've seen only one demonstration of it at The Lightroom Queen's blog, but that one is very impressive.
I rarely use Lightroom but this is the sort of capability that is very appealing to me the few times I need to do stuff my primary software can't do.