I rarely if ever, comment on this Accident Forum, so please allow me to note my observation.
I see that upon looking at the Runway Chart for Declared Distances shows a Take Off length available from from Intersection D5 on heading 12R is 2266m.
Whereas the Take Off distance from D5 on heading 30L (which they used) is just 1273m.
Using D6 for 30L is 2349m (almost the same as using D5 for 12R)
I think it is glaring that a mistake here was possibly made by the Flight Crew (or they were misled by other reasons, as yet unknown) when viewing and checking those numbers,
hence the ATC calls to remind the Crew that they were now lining up for a very short Take Off distance available.
I err to superior knowledge of course.