It feels to me that the ball goes to where the players are, rather than the players going to where the ball is (hence passes going directly to the recipient or an opponent with no in-between, magnetised to one or the other, even on full-manual).
There's no flicking on a ball with a header into space for a player to run onto - they are simply telegraphed directly to a player.
That's the killer for me, and my biggest worry with "Authentic Mode" is that they'll never have the resource to reverse the "for-fun" / ultra-responsive physics simplification.
Anything that makes it feel like that wasn't "my" pass (or my player's pass considering his attributes / body position etc.), but rather the AI simply "autocompleted" the pass for me, is the opposite of fun to me.