Here are a few.

[Brooklyn]

First off...this is a great idea, and the beginning of what really could be something much further.

when in the minors, at least have the logo of the minor league team you are playing for somewhere in the stadium.

I think once you make the majors, there should be at least a professional looking stadium. If it can't be the real deal, then at least have it look different. Of course an arial view of your real stadium would be nice.

Further your career after you retire. Be able to manage in the minors and work your way to the majors. This way you can be a part of an organization you once played for, or go against the ones you hated during your career. If that is implemented, then this could also allow yourself to watch the progress of your possible Hall of Fame induction. See how many votes you receive year after year, and hope you do better each time around until you either make it, or get dropped from the list.

Have a place you can visit to take a look at the World Series Champions list. I like to see who won in the past, and never can. Also in this place you can view Batting/HR/2/3/SB/Avg etc records that stand, so you can see if anyone is close to breaking them.

A Newspaper stand, so you can at least keep up on happenings around the leagues.