There's a lot of people here making the assumptions that 'Smaller Worlds to reduce FPS drops, and improve performance is an invalid excuse' and I agree, but not entirely. Yes, it would help performance, we all have to admit it would improve performance, however, the fact that this game had performance issues IN THE FIRST PLACE is the problem, the fact stated above is true but what's also true is that this game performances well under average, and the people who said they are catering for lower-end hardware are 100% on the ball. A lower-end machine will statically preform better in this game to a certain degree. I have an i7-7700K, GTX 1080, 16GB and I still get performance issues in some worlds. There is one big problem and one simple answer/explanation to this:
It's 2014, and the sims team thought the best idea moving forward for CPU optimisation in this brand new game is to LIMIT the game to 2 CPU Cores, which was absurd for any game after 2011, to be honest. This was the worst development choice the company could have made, and for people who think the game has multi-core support, yes it does, but it still only uses 2 physical cores. Name 10 people who still use Dual-Core processors.
This then creates my problem, only 50% of my CPU is being utilised, I get performance issues, because the game doesn't use the entirety of a system! Too late to fix this now as it was part of the base code.
So, I appreciate smaller worlds to combat this, but they created the problem in the first place is what I'm saying.