I don't know about that. The more customization options, the better. Konami has removed several options and player ratings from the game the past few years, to the detriment of the overall gameplay IMO. That's the bottomline as I see it.
That's one of the options they changed/tinkered with that just doesn't work. Set every CPU player's attack to low and defense to high, and the CPU will still relentlessly attack. Whereas if you do the same thing in FIFA 12, the CPU will continually pass the ball back and forth without really moving forward. Those settings work so well in FIFA that you can allow the CPU to enter your half, and then if you pressure them they'll pass the ball backwards and exit back to their own side of the pitch. Nothing like that is possible with PES' tactics settings as far as I can see.