Would be great to be able to do the shift LMB (copy) and shift+RMB (paste) for materials in the scene tree. I love that function in the live viewer, but a lot of my work involves LED components under clear glass and plastic, so being able to quickly do the same in the scene tree where my OCD has already organized everything. I know I can select all and access the material copy/paste through the contextual menu, but shortcuts are much more efficient.
That's a cool shortcut idea.