Add more records to break in RTTS, team records, stat records, playoff records. I remember 2k a couple years back had pages of records, give players something to keep playing for.
Keep track of playoff stats and spring training stats, instead of just having a reason to simulate through them.
Add a trophy case to view all of your players achievements/ awards.
Add stat lists so you know who you are passing as your career progresses. Watch your players climb up through the top 50/100 leaders of each stat type.
they used to have a stat list that you could work toward breaking but now it is in you profile so you end up breaking them with all your players you created