No, I don't want to add hard coded styles in settings, but it allows you to style a form different from others via css by using the extra wrapper class to make a more specific css selector.
Like you might have something like this for setting the textbox width
.qtext input { width: 300px; }
but on a specific form you could add a custom class say narrowform, then you could use
.narrowform .qtext input { width:150px; }
this is a more specific selector and it would be best for it to appear lower in the css file than the default style rule.
Best,
Joe