From this thread
https://forums.ootpdevelopments.com/...d.php?t=322053
Currently, we can't see how things like stolen base ability, hold runner, range, contact vs right or vs left change through out a player's career.
And then there is defense
Currently, the scouting report only shows a defense rating, but not the range, arm, and error avoidance ratings that make up that defense rating.
Further, the overall defense rating is dependent upon position. Meaning, if a player changes position, the defense rating changes, even if the player's defensive ability didn't actually change.
Take an example of a third baseman who moves to first. Maybe this player is rated a 4 at third and a 6 at first. Looking at the scouting report, it would appear their defense got better - changing from 4 to 6. But, it did not, the player just moved to an easier position. The player may even have gotten worse defensively (say a decrease in arm) but the scouting report says they improved (because first base is easier than third and arm rating is less important). The scouting report, as is, is completely misleading in these situations. It compares apples to oranges (first basemen to third basemen) instead of apples to apples (range rating), oranges to oranges (arm rating) and pears to pears (error avoidance).
The scouting report should track more information
EDIT
Take the following player
You can see the scouting report shows an increase in defense rating in August of 1993. But, this was because the player was moved to first base. Because of that position switch, we can't compare apples to apples. Did his defensive ratings get better? get worse? stay the same? We don't know.
The separate defensive ratings (arm, range, avoid error) should be shown in the scouting report.