I suppose this might become the way the game is developing, Maybe Seasons was the last of the universal update EPs and we now get more hidden game specific lots or options that take you out of the main worlds. University could be one of those with 1 huge campus lot and the rest dormitories or rentable houses, Farming EP with huge farm or a Marina EP with huge seaside lot. A Zoo EP probably could only house one zoo.
I do remember sending a lot of my Teenage Sims off to University just to get rid of them in the past. :)