Allow the collapsible sections to be controlled by dynamic rules.

This would allow a more wizard like approach to filling in a request form.

Where initially Section 1 is expanded and Sections 2, 3 and 4 are collapsed.

as you complete section 1 you click next and section 1 collapses ,and section 2 expands.

This gives a much more stream-lined approach to the form and can even skip to section 2 if a specific answer is given in section 1.