Seemingly pedantic point, but this is a UX design problem not a QA problem. QA is largely something that you want to automate, minimize, and reduce the cost of. QA is making sure things work as designed. UX design is something that you want to maximize. That's figuring out what you want to make.

The tools of the UX design trade are very different. I think the best UX is done with mockups that go into customer feedback sessions. The middle ground is lots of static drawings of UX, which leads to a lot of bikeshedding and not a lot of real data. Obviously the worst is no UX design at all.