I believe there will be loss in performance, not in quality, and that's why: you know, different players have different tasks to do on the field. And if MC will be put into DC role, for example, he just can't understand what he should do. Same for the other positions. But, related positions (MR->AMR) will be easer to understand what should player do, so there are yellow triangles. But, it will be totally fantastic if player, playing on related, not on natural position, can master this related pos. if he don't mastered allowed 3. For example, after playing 20-30 matches.