I didn't notice much difference between 52 and 51 to be honest but I did back down to 50.
No you can't change sliders on PES. What I'm saying though, is that if you guys are having a couple of good days with sliders and then you need to re-adjust them again..and the game has been out for months now, well it's a bit harsh for people to complain that EA or Konami can't get the balance of gameplay right when they release the game.
If it WAS so easy to come up with something that plays well and stays really good all the time, then you would have settled on it by now.
Well thats them I speak for me. I only done a couple adjustments and have enjoyed the game since then which was just after release.
I am always up for new ideas to try and improve it and though I have edited my sliders quite a few times its mainly for experimenting and perhaps making it even better.
It has always been a 8-9/10 enjoyable game for me....if some adaptations can make it 9-10/10 game then thats even better.
I can keep my sliders as they are and enjoy fifa 12 all year IMO...even online and 2 player which is default sliders.