I did some analysis in other threads, linked below. The defaults are mostly close to reality. If I had to pick two things that are farthest from reality, I'd say bump up your stolen base attempts by 30-40% and increase pitcher development speed to about 1.25.
http://www.ootpdevelopments.com/boar...t-lhp-rhh.html
http://www.ootpdevelopments.com/boar...h-delight.html
For scouting accuracy, I'd also recommend "Very Low" because OOTP scouts tend to be too good relative to MLB.