I also have a personal opinion on let-off.
I would like to reiterate "Personal".

I feel that, based on my experience, my bout with target panic came on with a bow that had high let-off. I figure I started aiming "too" long.

In the old days 50% let-off was the norm and if you shot a bow with over 60 lbs. of draw weight you were an animal.

Most people I shot with were using bows with 50% let-off and set on about 55 lbs. Also, 28 inch draw seemed to be the average draw length.

Now it is 70 lb bow with 80% letoff and a 30 inch draw, probably an inch or more too long for most people.

Like I said in the beginning, I felt like I was aiming when before I just pointed and seemed to have more control with a lower let-off bow. That is why I went back lower let-off. I was more accurate.

It didnt have anything to do with being able to hold longer to be accurate. It was all about not holding too long for me.

Hope that makes some kind of sense.