Soccerdude
Registered User
First, Player ID is a feature of simulating player's way of movement and style of running, shooting, passing and so on, this feature requires capturing and watching a lot of the player videos to duplicates his style in the game which surely would consume a lot of time and efforts. So Konami have modelled 50 players only this year (the like of CR.7, Pirlo, Messi & other famous players) and will keep adding more players to the list every year as they implied (Konami).
So one of next year's features is (EXTENDED PLAYER ID).
As compared to FIFA I have always found PES players to perform more realistically even in PES6.
Also a players Height,weight,width plays a major part in how they play on the pitch.