I feel it is becoz my MC dribbler Ayuk recently scored 2 and assisted 2 in a 7-0 thrashing and got a rating of 6. My striker scored 2 and assisted nil and got a rating of 8. Plus Ayuk's both goals were his own and were not assisted. Neither did he miss any chance in the match. So maybe it is just random. Also it maybe that a player doesn't get much of the ball in the match so he gets low rating. But in that case a player usually gets 6. 5 is too low. Rarely does any player in my team get that. Maybe a couple of times a season.