Like in 'adobe indesign' for instance you can redefine a style and then it changes that paragraph style across the board. It would be cool if you could choose any text element and then right click and redefine the style to all H2. (so all H2 change to that style)
I often find myself to save time with the initial design to use plain text blocks and then having to go back and based on my design decide if I want a particular text element to be the H1 style and so on.
Not sure if anyone else has come across this but can be time consuming to restyle everything and keep clicking between the 2 to make the changes.
This capability to style all base elements is available under Global styles for headings, paragraphs, links and additional base HTML elements as shown in this tutorial.