The game has updated 2016 rosters and AI improvements. Other than that is does not yet have any obvious new features, however keep in mind the game is already extremely solid and is not really intended to get overblown with features.
We will continue to provide free upgrades throughout the year which will add a couple of new features
But for next year we have some massive changes in the pipeline, essentially merging MLB Manager 2017 with OOTP 18, so stay tuned!
Thanks for your support!
Markus