(I’m the Webflow dev that built the left navigator experience.)
We’re bringing back one aspect of the right navigator: while dragging an element, if the navigator isn’t currently visible, it will show and be usable over the tabs on the right. This should make it easier to accurately place elements, without overlaying the canvas area. It will work the same way on large screens, if the navigator isn’t pinned/visible.
You can still drag over the navigator icon on the left, to show the panel version.
Thank you for your honest feedback. We’ll continue to work on ways to make the Designer more usable for everybody.