I think we should have it so if you die in an explosion, all your little avatar parts are scattered everywhere. Would probably require improvements to debris objects to do, but it would look nice.
How about an animation where the minifig is on its back with its arms and legs comically spread to its side for when it gets run over. Or how about when impacting the ground at a high speed, a face-down variant of the same animation. Maybe if the ability for a corpse to be rotated properly is added, this alternate death animation could be used for other impacts such as slamming into a wall, playing this animation while rotated to face the wall, then shifting back to the normal death animation and rotation while falling.
Maybe a heart attack animation for Self Deletes.