I'm wondering the same thing...it really foreshadows the darkness. That was such a good scene!!! Why on earth would WB, or whoever decided it cut that...I mean there were lots of scenes in other HP films that were really really dumb and it made sense when they were cut...but this?!!!

It was so good! It showed the terror and tension building of the upcoming war starting and I had chills...especially the part with Snape because his emotions felt so palpable at the moment...such conflicting emotions! And once again, the part with Draco was brilliant...he truly looked possessed. Ugh HP filmakers, that would have been so good to put into the actual film...I would have definitely cried even more at the time of Dumbledore's death! =(

I admit Im not a David Yates fan and absolutely hate what he's turned the films into but that one scene had a lot of story and depth behind it. It was done very well...maybe that's why I cant like him lol cuz his better scenes are always cut haha.
Hope DH is executed like this...