The "Vader Reaches Out" scene wasn't edited and finished for the Blu, it was completed in 1983 and John Williams scored it, but then it cut from the film just as they were about to send the film off. It was a very last minute deletion, probably because they felt Luke already had a dramatic introduction when he appears to Jabba and because it creates buildup the way each character is introduced one after another (Droids, who then witness Leia, who brings in Chewie, who leads us to Lando, and then finally Luke comes and the action starts).