Im interested to know how you track the improvements of your player. How you know they are better? How you know they are playing at their peak? how you know they are going to make the grade? and how you monitor improvements of their stats.
Its crazy that there isn't a feature that shows you their improvements in stats like a green upwards arrow or red downwards arrow next to stats that have gone up or down. Or a feature that shows you month by month the ups and downs in their stats.
Look at the player, then training, then click the graph to see his progression in the stats you want to see
The green and red arrows are also in the game although this is just his short term progression and unless looking every day at it, you might get mislead. Just look at his stats and click " show .." In the top right corner of the header of the stats.