I use my redirect script to get back to the classic core editor (the best editor) instead of using the new one, but I figured I might as well make the new one more useful for anyone who wants to use it.
The major complaints about the new editor are the lack of spell checking, the lack of word count display, the lack of the HTML toolbar, the lack of an interface to link to previous posts, …. If you haven’t picked up on it yet, the new editor is lacking a lot of functionality that the previous two editors had. The easiest one to address, and the one I decided to tackle, was the lack of space. The sidebar takes up a lot of space, leaving less room for the editor itself. I decided to take an approach similar to how I improved the new stats page and came up with this:
Just like in the stats page style sheet, hovering over the visible portion of the sidebar lets you access the contents of the sidebar.
It currently does not expand the editor past the normal boundaries to fill the screen completely, but if there is sufficient demand for it, I can make the change.