The ability to go through all styles without leaving the Paragraph Style Options window. Like forward and back arrows. If you are editing multiple paragraph styles at a time (or character or object styles for that matter), currently you have to close out of the dialog box every time you want to toggle to a new style. It’d be nice to toggle or click through to the next style (alphabetically), or choose it from a drop-down menu.

Also. when you have a long list of styles, the ability to search for them by typing. Right now, you have to scroll. It’d be nice to start typing and the results narrow. This would be especially if you use a lot of styles, like I do, as a book designer.