You know you can drag layers to reorder them using the xml editor window, right?
I’ve been using Inkscape for a long time now as replacement for Corel and AI. At this point I’m used to it so that I don’t miss any of the non-FOSS counterparts. It’s true I had to get used to having less features, but I learned to do what I need with the tools available in Inkscape. I now usually install Inkscape on Windows machines too when I have to do some work on them.
Not saying it’s best, just saying it’s there if it needs to be used. I just do without dragging layers to reorder usually (i use send to back and bring to front a lot)
Very rudimentary. Off the top of my head, doesn’t include layer groups, duplicating layer groups, previews, grouping of two objects is not shown. I am sure there is more.