Can we once and for all retire the "I want my teen Sims to look 12 years old" thing?

I understand your argument but I think height would be a good way to make them look more different compared to young adults... I think all that the game does is changing their body shape a bit as you mentioned? Those are details that are pretty difficult to spot.

I never wanted the teens in my game to look like 12 year olds... I just wanted them to look a bit different.