The way Pathfinder 2 has decided to implement versatile damage makes little sense for most of the weapons it applies to. For instance, what exactly is a character doing to switch a morningstar between bludgeoning damage and piercing damage? Why can't you use polearms, especially spear-like polearms, to deal bludgeoning damage? What is gained by removing the tempo advantage that a cut-and-thrust sword traditionally used to its advantage?
It simply doesn't make sense how the trait was assigned and why it takes an action to change between damage types.