No coach comments are not what I'm looking for. In those you only see that player's natural roling play is, lest say, QB. You don't see how many stars he has playing on that position. Now with inexperienced players thats almost always one and a half stars, but for experenced players that can be star and a half or even five stars and all coach comments would say is that his natural playing position is QB.

See the difference? Also I suspect player with lots of stars in his natural position is harder to retrain to another.

yup Senor Bowlerdude hits the absolutely right button once again. your natural position is the rating that you have on your players individual stat page.

all other extrapolations on positional fit can be made from there.