You remember percentiles, right? A rating that has a percentile of 50 means that its value is higher than 50% of the pitchers in that universe. A rating with a percentile of 90 is higher than 90% of the pitchers in its universe.
If you look at the first chart that lists pitcher's potential Stuff ratings, you can see that in OOTP 24 a rating of 7 is at the 38.4 percentile, i.e, only 38.4 % of pitchers are rated worse than 7. But you can see that a rating of 7 in OOTP 25 is at the 86.4 percentile, thus in the top 14% of all pitchers. That's a huge change.
Looking at the Movement chart, a 6 rating in OOTP 24 is slightly above average at 54.2 percentile. Now, in OOTP 25, a movement of 6 is in the top 12% of all pitchers.
For Control, a 6 is again slightly above average at 52.3 percentile in OOTP 24. Now it's superior to over 2/3 of pitchers.
Here are two more charts:
The range of pitchers' BABIP has been compressed from 1-9 to 3-8, a decrease of 33%. A value of 6 used to suggest a fairly average rating at 41.7 percentile. Now it's in the top 15% of all pitchers.
For Home Run Rate, a 6 used to be slightly above average. Now it's in the top quartile.
