re: balancing...I saw someone commenting liking the tradeoffs, but I think there's an imbalance in that it's possible to maximize pitchers without having to swap your coaches in and out, but it seems (unless I've missed something) that you can't have both weighted swing (for bat speed) and film study (for prediction) at the same time.
I mean it's fine if that's intentional, but in practice it means that late game I'm inclined to leave my maxed out outfielders sitting there and only cut/refresh my pitchers.