Unless there's some completely unheard of surprise in the city that everyone learns on the same day, regardless of time-travelling, then it's a tack =/
Like a Meteor Shower that opens up another portion of town, kills Phyllis, and turns the music back to GCN. If they do that, I'll sacrifice my new car.
Sadly, it definitely is a tack... Nintendo would have been waaay better off giving us a bigger town, more things to explore, and more things to do in OUR towns...
like a soup shop, you know... That'd go so well with coffee and all...