Obviously like almost everyone, realistic AI.
Hopefully, this version will have the AI taking quick singles, or drop and run and the end of the innings, and hitting more two's. Even stuff like knocking it down to third man to rotate the strike would be nice.
Quite excited for the PC release.
Edit: One thing I have noticed in the recent video released is that the speed that the ball comes back from the fielder is slow. Even from mid off or mid on, the throws seem loopy rather than flatter and more direct.