Hm, that should not be too complicated; have you tried to make the desired changes in Creation Master 16?
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We'll take a sharp look at those players. I also find some overrated players in other leagues and - conversely - some which should be better. Sometimes EA's players were only rated regarding the few teams they have, so weighting isn't really necessary.
I have sometimes the same problem with playerpics - but also no idea what the matter is...
Another thing i recently noticed (gonna double check that): I was unable to start a second manager career - the game crashed to desktop when starting the first game of the season.