It would be helpful to have text configuration type that would render as a textarea instead of a text input to provide more area to edit and view the configuration text.
One example of how this might be used is for a scoped css fragment I have created. The fragment includes a dropzone and let's users configure a css selector and the styles that will be applied to the selector. Behind the scenes the fragment creates a unique classname and applies it to the container and prepends it to the css selector so that the styles are scoped only to the html that is placed in the fragments dropzone.
The nature of css styles would make it easier to edit if it was a textarea rather than a text input.