Honest Opinion on Longevity left in Game.

I recognise that they might have released most of the "main" characters but this really doesn't worry me, to be honest I prefer it when they release obscure characters (Yes Guy and Mr. Costington spring to mind). The more they scrape the barrel character-wise, the better the game is for me: there's so many one-shot characters I'd love to see (still no Don Brodka! Maybe next Christmas...)

As for buildings... I think we're safe for quite a while
http://static3.wikia.nocookie.net/__cb20100117045536/simpsons/images/f/f7/Map_of_Springfield.png