I would have cheered.
(I don't like Bumblebee.)
I think he's a nice character, but he has sucked up merchandising from a lot of characters (I believe if there was no Leader Bumblebee, we would have a DOTM leader Megatron).
However, he seems to have never been put in any serious danger, the execution scene was the closest to a BB death we ever got. But even then I never once thought he would die. The point of this thread was to say I think Hasbro has learned from 1986 and the whole Prime incident, and I don't think they wanted to risk that with BB (regardless of how many memorial toys they could've sold).