I hear what you're saying, and that makes sense. I'll take a look at some of my guys to see if A) they've shown a drop in fouls/ over the seasons, and
if it correlates to a specific skill increase. It might be a hard analysis, though, because for most of my guys they've been increasing in a variety of skills, and experience, the whole time. Plus, it seems like playing in a higher league would 'undo' some benefits from training since you're playing against tougher competition, so that will need to be taken into account.