Those would all be reasons you change or rule something, but none of them explain what "can't be located but isn't hidden and is within 30'" is, does, or how it works.
The RAI is very clear -- no designer has ever indicated that there exists a situation where there's a creature that isn't hidden, but you don't know where it is, and is within 30' of you and not behind total cover. That's the use case for this ranger ability if it does what you claim. So for, no one has been able to suggest what that looks like or how it works, they just say it does. Can you give me an example of am invisible creature, within 30' of a PC, who is not hidden. and the PC doesn't know where the creature is, but would be able to see if it were not invisible? I'm don't understand how this works, nor how you would get there.