I think, center positions are better.
My both PM (old and new) play(ed) MC. For sure, my old PM was optical, based on goals/assists much better than the new one, BUT why is the new one on an average rating of 8,9? There are so many reasons, you can't compare, to get a 100% result: maybe my new PM made the same (or more) assists/goals, if he had played instead of my old.
Maybe Nordeus changed some things about CK, direct assists,... or... Costa is now a legend player, and no one can "beat" him anymore?
(Costa need one more MoM-title for new record of 23 - and we are at the beginning of week 3. oO )
PM of my wife and her brother both DMC. They make no CK, but nearly every game, the icon pops once or twice.
I had a defender, who was 25 y.o., shooting and finishing at his last season were 1%, but he scored 12 goals. So, I really don't know, if the attributes are important.
Another example: Costa is my best player at shooting, finishing and creativity. He will be the best player I have (had) for a long time, but he is the worst penalty-kicker.
Kraxner, overall worse at attributes is my penalty-scorer. 4 seasons ago, he started to be my PK, and I don't remember a penalty he missed.
Both are FK.
That's why I think about some hidden stats or something else.