It's a bit unfair in my opinion for you to speculate that people who like the Temps and their music might hate the show, not having seen it. Perhaps that's true, but the show is selling out every seat, the reviews were very good if not excellent for the most part and word of mouth, at least based on what you see and hear while leaving the theater seems to be very strong. So since you say that you like The Tempations, give it a chance and maybe you'll really enjoy yourself. And I doubt you'll conclude that the songs were "barely incidental ".