at pes6 all stats grow except Agility, Agression (maybe i forgot something)
when a player starts to go down, Attack and Defence do NOT drop, but still can be increased! (85 % ) it's something like experience.
but after pes10 agility and agression changing by years and imo thats more real.. a player at 36 cant have agility over 90..
want a job at KONAMI.. seriously..