This is extremly important, at the moment when you create a paragraph style you can't edit it. and you can't load Paragraph style the way you do in Indesign.
The ability to Load let you create one set of Styles and apply it to different website so you dont have to recreate a new set for each job and you will have all your styles and names consitent in all jobs. And with the ability to edit the style you just change the colour of the font and change the tye and bang you are done.
I hope this gonna be implemented soon.