Hey Niko,
did i get it right, that the gain in skills by training depends (besides other factors) on the Star-Level of the player but NOT on the level of the skill itself?
For example:

A 5* player has a greater gaining in Skills (for example: "Speed") than a 6* Player.

BUT

A 5*Player with the Skill "Speed" at 210% gains as much as a 5* Player with only 90% Speed-Skill

Is that correct?