The problem with all these similar games is, they lack their own identity. All of them just focus on every day modern life, taking out all the fantasy elements and anything interesting.
They need to be doing something the sims has never done to be able to make a base game appealing enough instead of feeling like a huge downgrade that would require 10 expansions to reach it's full potential.
Like what if a company gave us the sims medieval game many hoped for, but did not get with sims medieval? Where we can build our own castles, have career paths, basically just have the regular sims game in medieval times? With fantasy stuff of course.
Or maybe have a similar game set in the 90's or so, so there can be technology but the people wouldn't be obsessed with their phones and computers, requiring to be more out in the world which is more fun to watch. Or set in the 50's, or victorian times... Just something different.
Or focused more on like a particular active career style, having just one active career with anything else rabbit holes. Like say, superheroes/villains. The secret identity could be a whole thing. Could also just play a regular family, within this world where superheroes exist.
Just going with a higher age rating like 16 could also be a way for such a game to set itself apart, allowing for more mature storylines that may involve alcohol, smoking and murder but also consequences for those things.