Originally Posted by CobraSvt
This may be a little late, but I have found raising your hands and taking the club back straighter with a steeper swing path helps. As for the high shots, a steeper angle of attack definitely creates this if you have a higher swing speed. Most amateurs don't understand how a negative angle of attack makes the ball fly higher; truth is the spin. The average PGA pro has a negative 4.1 attack angle with a 6 iron.
I suggest you do some googling on what spin loft is, your statement isn't correct. You can increase spin in three ways: more negative AoA with same dynamic loft, more dynamic loft with same AoA, or more negative AoA and more dynamic loft simultaneously. This is assuming the same clubhead speed and contact location on the clubface.
Spin loft is dynamic loft minus AoA. Jack hits a 5 iron with a dynamic loft of 15 degrees, AoA is -2*. Jack's next swing has the same dynamic loft, same speed, same contact location, but he hits down 6*. Jack's first shot has a spin loft of 17 and the second shot has a spin loft of 21. The second shot will actually launch lower, AoA will "pull" the ball down. Which why for drivers having a positive AoA can be beneficial for a lot of golfers. Hitting up will tend to decreased spin loft resulting in high launch, low spin conditions that maximize carry.