High School Years did attempt at improving Teen Sims, however it was far from perfect. I do love how they added some elements of puberty, like the acne and body hair growth. However, in my opinion there should indeed still be a life stage in between Kids and Teens, and it could be called Tween or Pre-Teen. The Sims Freeplay has Tweens and now I do have a LOT more hope that tweens could make their way into The Sims 4 in the next few years hopefully. Also since there are more younger life stages now, maybe they could add at least one more Adult+ life stage, in between Adult and Elder. It would really help with the lifespans as sometimes it makes me laugh how Bella Goth is a Young Adult and Cassandra Goth, her daughter, is Teen, only one life stage behind! Makes no sense lol :D