This is worth looking at in depth:
https://docs.google.com/document/d/1...73Rl9KSzo/edit
From the Devs on this thread:
https://forums.ootpdevelopments.com/...d.php?t=352897
Long story short, they changed how they calculated ratings to mirror real life more. Nothing really changed with your players, its just now there are more 35-55 rated guys and less 60+