The article posted above is from the Atlanta Journal, published Dec. 12, 1979, just days after the film opened. I suspect after coming out of the film's showing, some of the faithful few were a bit let down after the buildup of anticipation. But, later films would help lessen the feeling and restore their faith.
The soundtrack review below, clipped from a magazine about the same time, was really more about the author airing their lukewarm opinion of the movie, while the actual soundtrack review is reduced to one sentence. One. People just hoped and expected for more. But with the next movie, they got it.