This was also my first impression. But it seems to me the changes are mostly about swapping what panels dock where (left or right) and maybe some additions/tweaks around the AI panels. On macOS these are still the same:

    ⌘B : toggle the left dock
    ⌘R : toggle the right dock

If you opt-in to the new layout, the panels that used to sit in the left dock are now in the right dock. I will give it a try even for classic coding. One can change what panels get docked where from the settings window.