The major temporary change is that now the Physics Selector on the top is a sub-panel that can be closed - saving space. This could be temporary modification until a long term solution is implemented (like a new Modifiers UI).

I know it's not great but please leave this as it was, otherwise the hierarchy is not clearly communicated. Users can just scroll with a more narrow properties editor.

If we need to save space then adding a physics system could be done from a menu.