Hi Inactive User,
in the past I also thought about such a "usage analysis", but didn't come up with a solution. I tried to go through single parts of the community step by step and take a look at every single node and common pages (e.g. post/edit page).
Via the browser developer tools I then checked the DOM where you find a CSS class which tells you the quilt in use. But it's a messy work^^
Additionally, there is high risk to miss some quilts.
Maybe such a feature is good thing for future SDK releases or better: There is already a "hidden" feature or at least a workaround. :)
Cheers,
Christian