Honestly I rather have a failure system than a difficulty system. I would love for aspiration failures, wants and fears, and a social requirement for jobs to make the game more balanced. I would love for an overall of the whole emotion system too so Sims feel more different from each other and have more negative traits and lots traits in the game. The game is so over run by happy traits and buffs, it doesn't balance it with other emotions unless a potion or berry or supernatural power influences it. I also find work from home jobs more challenging than active careers. I get bored how easy and mundane the active careers are in the game.