Right now my butler says "[player name] has left your street" when a visitor enters my tower. The player really hasn't left my street in the sense that my tower is still part of my street. It's really annoying if it's a friend and I want to come out of the house to give RK or say hello and I think I've missed the visit when they're just in the tower.
It would be a lot nicer if the butler announced "[player name] has entered your tower" and reserved "[player name] has left your street" for when the visitor is gone from your street AND tower.