Finally got some time to really play, biggest gripe is how ridiculously good technically every single AI player is. Never a loose touch, ball glued to them, even if you manage a tackle that gets the ball (I think I'm averaging two or three a game, dribblers still react before your player even goes into the animation and leave you stuck on the ground), or a player runs into your defender, they glide through and the ball comes right back to them likes it's on a string. Michael Carrick plays like Michael Laudrup!
Right stick player selection is clunky, and I'm annoyed they've left the strategy button on Select. Also, keepers are still kinda pants, and shooting is weird.
On the plus side, passing is fantastic, though I do get the occasional freakout where my defenders will seemingly intentionally underhit a pass (regardless of power) straight into the path of an attacker and the game won't give me anybody nearby and/or won't let them respond.
Tons more variety in animation, and much improved AI movement make the game look much more realistic. Faster players can actually outrun slower ones, finally, which is nice, though the whole game tends to be a little too fast and stretched, even on -2 game speed, imo. Don't want another arcadey PES!
Some definite improvements, some things not so improved. If they keep building on this, however, it could be the best PES in a long time.