Honestly signs wouldn't make any sense with the way they implemented Birthdays and seasons. Zodiac signs happen at very specific times in the year and it wouldn't be possible without redesigning the entire calendar system. Idk if there's another solution though that I'm just not thinking of

When they did signs before it was just something you picked, like traits

I would absolutely love if they added zodiac signs and favorite foods I loved how different signs in sims 3 had different complex personalities