The unfortunate legacy of the MLB 2K series for gamers was that it was never a next-gen product. They chose to simply build on top of the last-gen engine, and as a result there have been legacy quirks/bugs/"features" in every iteration of the game for the last ten years. For instance, you get the same small batch of hit types (soft line drives at infielders) ten times per game every single year. In the end, it was like the team at Kush Games/Visual Concepts could only try to patch up the same walls to a rickety old house -- they were never going to be able to unlock its full potential without razing the whole thing and starting with a brand-new foundation.
Say what you will about EA, but they took the time/resources to have separate teams that built new tech from the ground-up for their sports titles in this generation, and as such they at least feel like games that pushed next-gen tech. NBA Live looked amazing even if the gameplay sucked, NHL actually took a year off between Xbox 1 and 360 so EA Canada could build new tech for it (and it's been great), and Madden's gameplay has slowly caught up to its solid tech over the course of this generation.
As an Xbox gamer and die-hard baseball fan, I sincerely hope EA has been planning to jump back into baseball at the end of 2K's exclusivity contract -- just in time for new consoles, allowing them to again build from the ground-up for it. If they have, they now get the added -- and probably unexpected -- reward of not having to deal with 2K as a competitor in that space anymore. They can own the baseball market on Xbox 720 by default, and try (emphasis: try) to give The Show a run for its money on the Sony side of things.