And just another thought on SAs before I forget to mention it (again).

We usually think of SAs as a bonus (if any). There could be a trade off - IF we say that a Playmaker gets a bonus to things like passing then its possible he also gets a penalty. So, if we think that might be possible, we might want to take a balanced view/guess on what are the bonuses and penalties and see whats more important. Maybe a FK specialist can't head it....but if its an MC who cares; or a Playmaker can't tackle without fouling - that might be more of an issue.

But who knows - I just make things up as I go along - if it works, great, if it doesn't, I make up something else and stumble along. >.<