And IIRC it was introduced as being a relatively modern innovation in UX. So that’s a continuity break.
Only implicitly. In “Encounter at Farpoint” the obvious implication is that the computer being able to pinpoint a crew person is new functionality; the ensign says, *“You must be new to these Galaxy-class starships, sir,” and then gets the computer to tell her the exact location of Data, at which point it begins showing the route. However, it’s never explicitly said that the computer’s ability to direct someone to a location is new to the Galaxy-class, so it’s definitely not a canon break, and is at worst a bit of a mild bending.
Really, do you want the Enterprise to have less functionality than the smart lights in someone’s home?