Don't know if anyone else has noticed this but..
The stats page now tells you which stat is boosted and which is decreased depending on nature.
The shadow for the stat that is boosted is red..
And The shadow for the stat that is decreased is blue..
I've got an image here - you can kind of see it for the red one, but the blue is hard to see. The best way for you to see, I guess, would be to check it out in the game yourself.
It's kinda useful for people like me who are always forgetting which natures do what :P.