I’d love to see an option to see the Table of Contents at all times on a page. Ideally this would be in the top left and float alongside the content, staying anchors as I scroll down content. You often see this on documentation sites, and it makes navigation so much easier.
I like what your proposing too. I hope they implement it like that. As a workaround, the table of contents info window can become a floating window. To do this, click the “i” icon, then click and drag from somewhere near the corner of the pop-up off to one side. That way it wont disappear.