You are blurring the definitions here. Static loft is what's "built in", dynamic loft is what is presented to the ball and can be affected by body tilt, ball position, where you hit it on the face, and how the shaft lines up with your lead arm, etc. AoA is totally different, that's the path of the clubhead in vertical terms. Finally, spinloft is dynamic loft minus AoA.
A positive AOA will only reduce your spin if you have a lower spinloft. The best way to optimize your spinloft without launching too low is to hit up, and the only way to do both while swinging on plane is by using the setup described in the OP. The SLDR is kinda off topic and it has absolutely nothing to do with that fact, all it does is give many people good launch conditions.
You could be hitting down a lot and still be adding loft with your technique, and vice versa. This is why static loft on a driver can be completely irrelevant if you don't use the right technique. The fact that I could still hit a 7.5˚ driver very high does not mean 12˚ is too much loft for me; in fact I will almost certainly go to 10+ degrees on my next driver regardless of the brand because I can make a more correct swing with it and I'm no longer afraid of launching the ball low.