This is my layout in V7:
Note how I have two columns to the right, and the rightmost column is split in two. Similarly, I also have split the left toolbar column near the bottom.
In V7, I was able to do this by simply dragging. It was quite inuitive.
In WIP, the only thing I was able to drag to split was the command line at the top, and the drop zones for it had shrunk significantly making the experience worse. The rest, I couldn’t even figure out how to achieve.
I really hope that the WIP UI is planning to become at least as usable as V7 before release. Right now, I’m not prepared to switch.