Sims Four Live Mode is Lacking

What keeps me entertained is that I only play one family. I currently play a family consisting of parents, a teen, child, toddler, and dog. And that's the way I've played since Sims 2. Can't remember how I approached it in the first version. Repeating the same careers, aspirations, collections, maxing skills, etc, would seem extremely tedious. Even with a different sims with different traits. One of my sims just completed the business career, quit his job and is now focusing on his vet business. His wife just finished culinary, quit her job and is now working in the gardener career and will select the floral designer branch. He'll be working towards the botanist branch once his vet gets up and running. Once they complete their aspirations I select another that compliments the career they're working on. Sometimes I might even change their traits if I see it to be beneficial for the aspiration or career. The way I see it people can change over time so why not my sims. A sim that started out as a slob doesn't have to remain a slob. I still have lots of careers, aspirations, skills to get though but I can definitely see how it would be less stimulating for simmers playing multiple families.