Why do these things don't happen when we kill actors:
-not shoot already dead actors.
-blow up into bits after shooting them on their jet packs at their backs.
-turn into indestructible environment.
-get cut into half if killed (example: the lower half remain standing while the other is gone or something)
-burn into charcoal if got hit by any incendiary.
-shoot in fountain the blood of beheaded actors.

Wouldn't these things be awesome if it's in the game.

Because Data or any of the content developers haven't put them in.

Correct me if I am wrong, but they already can be cut in half. It just happens rarely.
Novamind actors do have the fountain-of-blood effect when they get their heads shot.
And if I recall correctly, the Huge Pack O' Mods (or Large Pile O' Stuff, dunno) had an incendiary weapon that turned people into skeletons.

Half of these can easily be done and half of them I would think aren't terribly great ideas.

People can get cut in half? I wanna see a gif of this, I've never seen it before personally.

I would assume it means they lose their legs and keep the top half as I'm sure you have seen before.

No, I remember someone once said something about people cutting in half, no gibbing involved. The legs and upper body would just separate from each other.
It was right after B24 came out.

Sorry but I want them to turn into charred pieces of chunks and ashes. Not insta-skeletons since I used them before on a Dummy ACrab and it also turned into a skeleton.

Anyone know if Data plans on adding more ultra-cruel ways to murder people? If so, that'd be awesome!

That was me, and I've only seen it a few times. It's usually the Ronin that it happens to, but I can't recreate it easily.

I am guessing that that means that you managed to put enough force in to break the leg's joint without gibbing the leg itself.

There is a code that disintegrate people into yellow dust, but it's laggy.

I would like to see one that incinerates people using fire glows, black dust, and fewer particles while trying to retain momentum of the dead guy and maintain the overall shape until the dust hits the ground.

This is possible, but few people are going to take the effort to do it, because it's an addition that would barely contribute.