I would like to further point out why order control of CSS classes is important. Beside visual organization of the classes which vastly improves finding the ones we need, it can also play a crucial control in cascading and inheritance.
The way I see it is that there won't be even a need for combo classes, because the class names will be arranged exactly as in a real-world CSS file, so the cascading will take care of the rest. Think opening a CSS file with an editor that had collapsed all properties and only the class names are visible.
Since Webflow functions not as a typical drag and drop visual editor and the way the product is developed requires some CSS knowledge, going further with this approach won't be a bad choice from a sales perspective, granted most of the Webflow users are already familiar with CSS.
So I'm a bit disappointed to see a rating of only 6.8, as I had expectations to see at least 8. But I do like Webflow as a product a lot.