I love the new update very much but to be honest, the % system is a bit confusing. I do not see what it brings to the game.
Basically, 4% are equivalent to 1 quality point (old system). You need 60% to get one level and, of course, 300% to get 1 star.
Interesting to see the higlighted skills but are they really crucial to your players' performances ? Not sure. My best attaker (a scout) has almost the same quality level in defense and attack and he kicks asses big time. So...