To have more ratio of star with less attack skills.. would be good to have some more performance data of players like these... I was one of these (the only on da planet really) who suggested, for next challenges don't face teams generated with equal skills, as we face always. A 6* can have skills at 8* and 4 and the teams can have mixed levels of stars in the players inside the teams, this can create weaknesses... at least if you repeat the game enough times this scenario should be different than with a amount of players with equal skills.
My idea was to implement something like this to make more unique teams and have some type of challenge (ex- if the midfield line is weak, maybe the wingers, etc..) a team with 1 9* and 5-6*'s for example would create some random scenarios where this 9 contributes, and some where nope...