Our QA teams would find it very helpful for an activity QA preview link to persist for the current user's session. 

Currently when testing an in-page experience:

1. QA grabs the preview URL 

2. QA starts testing on the first page
3. If they click through on the experience or the experience spans multiple pages, they must reapply the QA params and refresh each page

Expected/Ideal:

1. QA params persist for the current browser session so that we can validate a consistent experience

We like to keep the publishing rights very tight (which makes profile scripts less desirable as an option), and we also prefer to validate our final A/B test builds in Target against production and on actual mobile devices.