A little self promotion here, although this link was posted in the ootp 15 forum already. Here is my review of iootp 2014 at the bottom of this article:
Out of the Park 15 Review - Beyond the Box Score
If I could add onto it, I would say that the ranking advancements feel whacky. Player has good season, drops like crazy, player barely plays, moves up a bunch, etc. Then there are prospects who spend a year in the minors idle, but their potential goes from 60 to 20. It is to the point where it feels as though the next year's rating feels like a random number and isn't associated with any relevant data. I almost gave up because of that today.
I definitely enjoy it overall, but I do feel like it would be an even better game if it had more consistency.