Good news: no p-value threshold needs to be passed to switch from one UI layout to another. As long as they all cost the same amount of money to host/maintain/whatever, the point estimate is sufficient. The reason is, at the end of the day, some layout has to be shown, and if each option had an equal number of visitors during the test, you can safely pick the one with the most signups.

When choosing one of several A/B test options, a hypothesis test is not needed to validate the choice.

Yes, but assuming it was enhancing something already there, it was all pointless work.