I know when I'm flying too slowly on short final. Nowhere near the stall, but the sink rate gets silly. Can't see how an AoA indicator will better my Seat of Pants approach.
That has to be one of the most silly statements Ive heard since an instructor I was checking out told me that you should always aim for the first (nearest) displaced threshold arrow.
This margin should give enough so that you land at or near the stall.
Where on earth do you get that from, you dont plan to land an aircraft at the stall, you plan to cross the threshold at a calculated margin above the stall which after after normal maneuvering and attitude changes allows you to touch down still above the stall speed but less than the threshold speed
Gs example of 1.64 means that that particular aircraft is so draggy that it requires a bigger margin.
A very slippery aircraft may mean that at 1.3 there is too great a margin.
Slippery? I only know of one aircraft that crossed the threshold at 1.2 VS and that was the Bristol Freighter and one that had a published speed greater than 1.3 at the threshold and that was the Aztec