I would say there are flavor profiles that work and flavor profiles that dont work.
However, I dont know of any one profile that everyone adheres to or that works
in every case. Pretty much you want something that stands out (which means is
different than the other 5+- BBQ's located on your table that day), isn't too spicy/hot,
isn't too sweet, isn't too vinegary, etc. What might really turn on one person might
turn the next person off. You're trying to appeal to the masses, blindly.
You are right, in that extreme flavor profiles are lost (at least aren't winners) in this
approach.