Here is a link to the safety first article alexious85 mentioned:
https://safetyfirst.airbus.com/app/t...g-approach.pdf
Things we lose by keeping the discon and not extending the runway (DIR TO) are an exact numerical offset and V/DEV doughnut. Things that definitely enhance SA during the visual maneuver.
I’m not arguing against the logic that the box may “eat” the runway when passing abeam, only wondering if there is a workaround. I guess the PM could extend the runway when passing abeam the landing threshold and at least have use of the doughnut (to late to correct any offset by that point)