When you start editing a page, the content editor window only shows around 8 lines of text. If you are working on a long page, you need to do a lot of scrolling, and it is difficult to concentrate on the content. You can manually adjust the size of the content editor window, but most people don't know that.
Idea: Make the content editor window bigger.
(Please note that this idea is different from Add an Option to be Able to Make the Rich Content Editor Fullscreen While Editing which would require content creators to click a button to render the RCE in fullscreen.)