Well, I do ...and I think the poster does also. Getting square with the shoulders and having the eyes and ball stationery prior to the lift are three of the most important and basic fundamentals of shooting, especially FTs. All of our poor FT shooters do not do any of those consistently. It is an excellent and easy fix on the way to improvement. If you look at the style of each player, they never get set, are always moving and especially the ball, and their lift starts at or below the waist. If you could get them to start square and stationery while shortening the lift to a point where it can be much easier to repeat, they would all improve quickly in both distance and direction which results in more makes.
From seeing the first FT of a player's career, you make a pretty good guess what he will do from the line. When you see kids moving all over the place with the ball and their eyes, and positioning to release at an angle, you can pretty much bet our life they will struggle. Guys who are square, still, and have a short, quick, and consistent lift/release are the ones the coach wants shooting technicals.
There are a few exceptions for players with extreme skill and touch, but even those few tend to miss at the end of a game when tired and under pressure. The whole process does not guarantee anyone of success in those situations, but by following FT fundamentals it allows the shooter a better chance to perform successfully when under pressure and fatigued just as well as they do when fresh.
Now, if you want to get into the 85-95% category, length, angle, and speed of lift, along with release, become the areas that need to be consistent over and over. They require a lot of reps and concentration.