It would be great if, when you set a unit to auto explore, you could set a few rules specific to that unit. such as "do/don't explore ruins" or "do/don't collect pearls" or "do/don't cross oceans". At the moment it automatically does all of the above even if you do not want it to. Sometimes I do want it to, sometimes I don't, it depends on which unit I am setting to auto explore and why I am doing so.