Has anyone else found that when you move up the divisions the ratings for your players drops? Some of my best players started with 3-4 stars in the 2nd division and are now 1-2 stars in the 1st, but according to training reports and individual attribute ratings, they've improved throughout that time.
Is it simply because they're playing at a higher level or because I've improved my coaches/scouts?
It's the change in the level. The reports are based on the level your club is at when the report is put together. An improvement in the assistant/coach/scout making the report can change the rating as well, but the main difference will be in your increased stature and higher level.