I create experiments for a major retailer, and current URL substring match capabilities force me to use JS conditions or callbacks for all campaigns on my PDPs and category pages. This is tedious and makes it difficult for non-technical teammates to run experiments.

For example, many retailers use structures like retailer.com/p/ to indicate PDPs and retailer.com/c/ for category pages. However, using those in the substring match fields will include all substrings with a "p" or "c" since the backslashes are not accounted for, opening up the test for many, many more visitors than we would anticipate. For example, the visitor would qualify for a test on PDPs with this url since there is a "p": www.retailer.com/landingpage