I get that. There are times I wish that they would go and add family connections to sims from pack to pack. Like when they released CL they could of made Zoey Patel related to the Rasoya family or with SE they could of made Miko Ojo related to one of the families in Mt. Komorebi. Instead all the sims in the game are separate and unaware of each other.
Also wish they would update sims and add fame to sims that made sense like the Landgraabs or the Fengs and even add stuff like character values or degrees. You know make it so that with each pack added premades end up feeling more complete and take advantage of the newest features/systems.
@LadyKyn
I never really thought of adding the sims from the spin-offs but I loved the urbz and if they ever added a acrobatic/cirus performer career I wouldn't mind adding Roxanna Moxie from the urbz. She was one of my favorites.