If you haven't already, go on the roster vault and download the OS Full Minors v2 rosters (I think they're from late May or Early June?). They are extremely accurate, and every single player in the minor league rosters is a real player, with real attributes, so it's perfect for franchises or just to play with the minor league teams. The attributes were also made using players' stats from (i think) last year or the last few years averaged. They also have someone who is taking those rosters and making every single player's swing/delivery and gear accurate. It makes the experience that much better.
Speaking of which, I could just watch people playing that game all day long just admiring the details of the stadiums (I just wish the fans would actually catch the ball