A/B testing has something to say about (ideally) a single choice. It has nothing to say about optimal solutions. Nothing about A/B testing suggests that you ha

A/B testing has something to say about (ideally) a single choice. It has nothing to say about optimal solutions. Nothing about A/B testing suggests that you have reached an optimal point, or that you should lock in what you have as being the "best". Now that the button position (or tighter layout) has been noted to have a material effect, more tests can be run to determine any more improvements.