It is simply great but needs some work in updating it.
First is the most basic part which is playing an actual baseball game. The creators at PlayStation have done a lot of work over the years with this part and it is probably at it's best now. This mode has the classic X, O, Square, and Triangle controls and a new analog set of controls in which you only use the analog sticks to play. I personally prefer the classic controls because it is clear where you are throwing as opposed to the new analog controls in which you have to push it exactly to the right spot or else you might accidentally throw to the wrong base. But aside from the controls the game also features throw canceling, a new contact swing in addition to the power and basic swing and many other things.
Now onto Road to The Show, MLB The Show's career mode. This has been slightly improved since last year. At the very beginning of the mode this year they have added a screen before creating your actual player in which you give a general idea of how your player will be ability wise. For example Power or Contact is a choice for a hitter and Stamina or Power for a pitcher. When you create you player's appearance, I don't think someone can look a certain way and not be able to look that same way in the game. You can edit everything from your size to your eyebrows. Then you work your way up to the majors from AA slow and steady like a real life prospect.
Then you have your Franchise Mode in which you are the General Manager of your favorite team. You start off choosing your team and deciding whether or not you want to do a Fantasy Draft or go with the current roster. Then you enter Spring Training in which you play games at fictional Spring Training fields. The cool thing about it is that if you don't enjoy going through that process, then you can end spring training and advance to the regular season at any time. Now during the regular season you can start doing business. You can schedule promotions, advertise in your stadium and add concession stands. This is my personal favorite mode but still needs to be updated as it has pretty much stayed the same over the years.
There are a few more game modes that are more minor and I almost never play that I will not go over such as season mode and rivalry mode.
Finally you have your online mode which I don't really use except for roster updates and the down-loadable players and rosters created by other MLB The Show users . But I have found it to be a very slow connection when I try to play a game against someone and I have seen many others say the same so the only pros here are the weekly roster updates and player and roster downloads so that's it.
I hope you have found this helpful and want to get this game now that you have read it.