The current Properties Inspector does what I want, faster (less clicks) then the previous one.
That's true for some things (I don't miss the popdown menu at all) but it's missing some features the old one had that I use a lot. One is the ability to resize an object by changing only one edge. Another is how it automatically switched to the alignment pane when multiple objects were selected. Also, the reordering of the icons at the top can be disorienting.
Having just finished two days of layout work, I doubled the number of clicks just getting back to the alignment pane after every object selection.