If you missed our review of R.B.I. Baseball 21, read it here.
Let me state this first before I get into what I like here with the gameplay in RBI 21. There are some definite animation issues that are noticeable from the start, and while they do detract from the overall visuals, I still found plenty of ways to have fun on the diamond.
The goal of RBI Baseball as a franchise is to allow people the opportunity to pick up the controller and just have fun. If you understand that, then what is provided here would be what I would consider a success.