Okay, so I downloaded the demo although I usually don't play demos anymore when I have already ordered the game.
Pros 
graphics have slightly improved on PS3 in my opinion. Looking sharper and better.

animations! Once again another step forward, best animations of any ball-game ever. Lay-ups look great, some of the dunks seem to be too fancy, but maybe its the sliders.

collision system! no more prescripted collisions. the game really noticed from where the contact comes and the physics work --> Westbrook gets bumped from behind on a layup -> will fall right into the photographers. --> Westbrook gets bumped from somebody in front on him while doing the layup --> while fall awa from the basket and land on his back. Same goes for posterizers. No more in your face dunks which have been captured before. In your face dunks will look different now depending on the dunk animation, where the defender stands, how much contact is made etc. --> make it unique

driving & defense. You can now offer your opponent one side to go to, which is good, although its tough for me because i dont like the camera relative control of the right stick on defense. More contact is made on drives now but it won't take away control from the ball handler. You can stay in front of the ball handler and force tough shots which I like.

player celebrations and reactions are awesome and very well blended, looks very fluid. I like how Harden goes down when hitting a three.

manual bounce pass. Really good to pass the ball inside. Deflections look very good.

pro hop button is back. Way better than the shot stick pro hop last year imo. Also the responsiveness after making pro hop/sig gather and then going for the shot is really fast. I like that.

passing has been improved. Responding faster

new hail mary animations which look great and make it easier to get shots off with the clock counting down. By the way: the show tenth now on the clock.

blocking has been improved
Cons 
this fucking guy who screams "woooohooooho" is back. I hate that. Really annoying.

new control is really difficult. So it's maybe not a big con because I can learn it. But I also don't like the new dribble stick. I can do a spin using the left stick although this should not be the dribble stick ... the dribble control just does not seem logic and you can pull off very unrealistic moves pretty easily. Definitely don't like that.

just like almost everybody I don't like the presentation. The golden stuff just does not look very NBA-like. Nowhere near any broadcasting.

signature skills are tough to see, maybe because of the sliders, which make almost everybody a good shooter etc.
Might update this, I played like 10-15 quarters so far.