If u can afford it I would suggest buying it.
The fielding improvements alone (1 outfielder gets to a routine foul fly ball while another doesn't, based on ratings) make it worth the purchase.
The improved ability for the user to strike out a cpu hitter after setting them up correctly is worth the purchase alone.
And, no one has mentioned the disparity in scores. Last year it seemed like every Game was low scoring thru 6 and then all hell broke loose. This year, every game feels different.
Also, holding a lead IF u have a really good bull pen is realistic. No more cpu mounting rallies like clockwork after u score.
Of course, if ur pen is bad, they will beat up on them.
That's as real as it gets for me.