Suggestions PART 1
I have several suggestions
First I do want to say that for the Sims 4, EA you are being too repetitive. Clothes and objects aren't as interesting anymore unless they are NEW objects. A couch that looks different, or a shirt that looks different, its not interesting anymore. If you are going to give us CAS and build mode objects, make it give us the feeling when we got the changing tables and real cribs, and even the playground sets.
Second, new worlds are sort of giving off the same vibe. It's boring. It's just a new world. And I know you're having issues with the popularity, but adding moola to the sims 4 is not going to make it more popular. Just be more creative! Here are some ideas of objects, and other additions...
I think adding more instruments would be fun, especially for people who play those certain instruments in real life, like the drums, ukulele, cello, etc. One object I was obsessed with was the baby swing in sims 3. Adding that, or a bouncy seat in the sims 4 I know I would love.