1: I tried to copy/paste layer fx and styles between layers. Many were in groups. The groups had styles/fx as well. It turns out that pasted fx don't apply to groups that are selected, only their contained layers. I had to either ungroup all groups, or individually go through and select each group individually.
2. I renamed all artboards, which I'd copied from other artboards. I went to export them, and they all retain the name of the copied artboards in the export persona, leading to obvious issues with overwriting and more work for me.
3. [feature request, i guess] - how do I "go to artboard / layer in toolbar"? While renaming all the artboards that I'd copied, I had to go through all of my artboards in the toolbar and find them. I don't appear to be able to rename them by selecting them in the canvas.