I would really like if they could do that, but I can understand why they have not done it.
1. That does not really go well with their current business model with separate packs, separate worlds, and that the game can run with any different number of packs.
2. That requires you to go back into older packs and change the coding, and I also assume that the amount of lots are decided based on how many they think the game can handle or that they had time to make with their budget. Those money and those people are no longer working on that, so people would have to go back and change things that they made a couple of years ago.
I would really like if that could be possible though. I'm not sure what that would fit in...a free update or an expansion pack? I don't think many packs have required them to change all the worlds except seasons.
