The analog controls are super smooth and will give the game a totally different feel. The best part is the fielding controls and how it's all revamped and the errors per player ability changes. The player and stadium models were in development since 09 released and we finally get to see them so the whole look will be much, much better.
Like the post above me the RTTS got a lot of love, but franchise not so much which is in the middle of a 2 year cycle to totally revamp it like the models were. Only changes are to trade logic and some minor off season stuff.
Many, many other little things aswell which these guys are the king of little things. Since you may want to play many more games than the standard sports game the little things is huge to not make it so redundant.
Here is a video of the new pitching controls. I think they are pretty nice looking. It's been said that pitching is easy to pick up on, but the new hitting controls are rather hard to grasp and keep a good pace with.
MLB 2011 The Show | Free Trial of MLB.TV | GameStop
Baseball is my favorite video game to play because the sport is not so cheese worthy like football is.