The original cut of the cave scene is perfect, along with the music. It's only when you get to the butchered Special Edition version that this scene falls apart.
We have to hear the Wampa roaring in the background. It sets up the peril. If it was silent apart from ambient sounds then it would just look like Luke was just trying to escape from a cave. There is no threat there at all. It's the Wampa's roaring that wakes Luke. Hearing the Wampa getting closer and seeing just a part of him as he approaches builds the tension. Is Luke going to be able to escape in time?
But then they ruined this for the Special Edition. It's the whole Jaws thing. If they had been able to do a better shark then it would have been on screen more and the film wouldn't have had the same impact. And this was proved with all the extra Wampa footage. Sometimes the limitations of technology at the time can create something perfect.
So the scene will be as it was in 1980 but with a new Wampa added in a couple of shots.