L&P aged Dylan up shortly after the very first release of his game because some of his Patreons bitched about him being too young.
He didn't have that many Patreons back then so he probably was afraid of losing the ones he had if he didn't do it which is a shame.
Imho he should have made Sophia a bit older (41 including a little bit more wrinkles) and tall (around 5'7-5'8) and Dylan 13 turning 14 during the story with a height of around 5'2 (still a bit short for his age but this way L&P could integrate his birthday as an event), this would also have made Sophias backstory a little less superhuman.
And also make Ellie 16 with a height of around 5'4 so she can tease Dylan with his height.
Also make Aiden around 17 years old and around 5'7 in height this way the whole Aiden blackmail story has a bit more of an impact with him being clearly taller and stronger than Dylan.
But honestly I have no idea how much of what I've just wrote is already in the game because it has been quite a while since I've played it and my memory is also not that great.
Edit: This way the story could also revolve a bit around Dylan entering Highschool for the first time.
Oh and make the Apostles 11 years old (height of around 4'7-4'8 this way it would be much clearer that the 2nd side job is supposed to be shota content) and fraternal triplets who just finished some strict religious elementary school to enter a public middle school this way their lack of knowledge and need for a tutor would make a bit more sense.
Edit2: And of course big dick shota please, thanks