Well, i have my doubts, that they would improve game greatly. Especially when i look at newest NHL or FIFA series games and comparing them with older versions. Ok, here' s some more stuff about roster management. Highest OVR RP goes as closer. Next-SU, then MRP. Callups will always be put as LRP. I also find out how to get minor SP eventually geting callup as SP when one of starters goes down(instead of RP being put in the rotation), but that requires at least one injured fielder.