I have been looking at Luke’s rescue in a lot of detail recently. And basically the conclusion I have come to about the sequence as it was meant to be is what is in the Empire Strikes Back Comic Book.
The Weather Vane was meant to Snap and the Falcon Reaches Luke Just in time to save Luke from Falling.
The Sequence has been heavily modified for some reason. But if you have the Comic Book you will see in there how the orignal version of the sequence was meant to play out.
The whole thing about a piece of the weather Vane snapping off now continues on that it breaks under Lukes weight entirely. I think it is a bit of a loose end that this is not what actually was in the film as this is what was actually “Meant” to be in the film.
Cinematically I imagine the shot to be from Below or even above the Weather Vane falls past the camera and Luke get’s scooped up. It’s quite a short thing all in all.
But all footage points to this being the case, just everything was changed to try and make it something that it was never really intended to be.