That's the thing that bugged me with sims 1 to sims 2 - there are so many -new- things they could do with expansions that making us wait for seasons, apartments, university, pets, magic, etc. is lame, especially making us wait again.
In addition, they removed pianos. Why in the hell did they remove pianos. Why did they make it a guitar skill and not a music skill?
Maybe they thought it would smart to do that as they can later put it up for sale at The Sims 3 store, since they seem to be more concerned as to how take money off us. Maybe not though, just a guess.