Distrubution of skill points matter? As in does a striker need more attacking skill points and will it improve his effectiveness? This could be tested with 2 teams. 1 team that applies skill points to their strengths (defensive players with defensive skill points, str with attack, etc...) and one team with equal distribution of skill points.

I am myself a player that uses defensive stats for defenders and attacking stats for attackers. I have been very succesfull over 18 seasons. But it doesn't prove a thing yet. Somebody else has an equally distributed team and lots of succes? That has to be a normal team without scouts.