I don’t see the conflict between the two scenes. Seeing the lightsaber makes Luke emotional. When he grabs the lightsaber, he throws it.
I don’t know what people expected, him to raise it in the air in that classic poster pose?
I expected him to walk away without even touching the saber, honestly.
Luke’s mindset is essentially the same in either case. Taking the saber and throwing it is just a more dramatic (and I guess surprising) way to accomplish the same thing.
He looked vaguely sad, and vaguely confused. Whatever the script was originally it’s not on the screen. Sorry to rain on your parade.
Not sure who’s parade you’re raining on.