Anyone knows what does really matter in this game? Only stars? Do you really need gain 75 skill level points in order to improve your player? I mean, if only is important to game engine stars (and morale, health...) but no skill points, gain fourteen points (for example) don´t really improve your players. Until you gain 75 points...

I ask this because the main info of players are stars (not skill points) and their price only increase when gain a star.