Hyatt has a single sign for all three levels, in my experience.
My experience is at Hyatt it is only a sign at the end of the desk and is seldom staffed, given precedence, or enforced if misused.
But if you advertise it, like Hyatt always does, but it is not actually followed, like Hyatt usually does not, then I would rather they just take down the sign. I don't have a problem with next in line but they need to stop teasing.