I really need/want a shear/skew tool, unless there is a way to currently do this that I don't know about.

I would also love a non destructive fillet command. I usually get my shapes built and then I feel this great anxiety when I fillet the edges because there is no going back! I know I can have a version of the object that hasn't been filleted, but it would be great to have some sort of non destructive filleting, that would let you undo it at any time in the future.