I find the ball physics to be slightly off.
mainly the way the ball reacts when pitching into the rough, it should not roll so much and have such a firm landing.
Also the ability to get a bit more check and check and run on pitch/chip shots would be more realistic, specifically of tight lies around the green.
Playing in soft conditions, the ball should hit and stick with little bounce and spin back rather than the large hop up then delayed spin we see.
Just generally more authentic reaction of the ball on or around the green really.
Another thing I have never understood in golf games is why a shot from the rough is always 80-90% or 50/60% etc, it is more than possible to get a 100% strike on a shot from the rough, sometimes even flyers of 110%, I have never understood why in computer golf it seems the only punishment of rough is on distance, If the ball winds up in the semi rough there should be no reason I can only achieve 90% power, it could be sitting up like an egg looking hugely inviting to rip a 3 wood into a par 5. In my opinion and from many years experience of golf from real to computer golf, the punishment in the rough really should be a tougher to achieve snap. Think about it - when in the rough it is absolutely crucial to hit the ball first steeply - the strike on the ball becomes absolutely paramount - similar to long bunker shots, If you take it slightly to early your club catches the grass loses speed into the ball and grass ruins the strike, therefore the likelihood of a mishit should be increased in conjunction with the severity of the rough, for example - in deep US Open style rough - you really must hit a more than perfect shot to catch the ball cleanly, if not you could flub it 40 yards. It is a really annoyance of mine that golf games assume that a 100% distance can not be achieved from anywhere but the fairway, it even applies in bunkers.
For me also - the result of the shot should be more varied when hitting from the rough I.E the chance of 1 5% flyer or loss of distance so however perfect you hit the shot you cant rely on 100% accuracy with distance as with a fairway shot.
But overall I am very impressed with the game, most certainly will be the greatest golf sim ever on full release. If the ball physics and a few other tweaks can be managed it could be amazing.