It would be incredibly useful to have the option for more control over the end cap in stroke styles/paragraph rules. For example, in Illustrator there is the option to use a softened end cap as opposed to a straight cut off, but InDesign only has a straight edge option, making it difficult to build an elegant line style without importing it as a graphic (this feature is sorely lacking in pursuits such as book design). The stock line styles feel garish or clunky and it would be oh-so-nice to be able to edit these or have more options to choose from. Please provide a more sophisticated panel for this.