While I too would love to see a more polished presentation that enhances the immersion effects, I completely disagree with diverting funds from the Storylines budget of the game to do so. Storylines, both the Negro League and Jeter ones, have been fantastic and I argue that more funds should be given to that part of the game.
Baseball is in the unique position of holding a popular place in American sports and cultural histories for well over a century. The fact that San Diego Studios has decided to showcase a tiny fraction of that vibrant history in a video game that it markets mainly to a younger(ish) consumer group, with no ancillary monetary inducements (i.e. micro transactions) other than the initial purchase of the game, is a credit to them. They deserve as much adulation for implementing this wonderfully fun, and at the same time educational, mode as can be given.
Again, I would love to see as much money thrown at presentation and immersion aspects of the game, but not at the cost of something as valuable as the Storyline modes.