The preview window shows video at a higher speed than "normal" so audio there probably wouldn't be helpful.

Maybe some kind of feature to "normal speed" preview the "results" of what you have selected? Maybe when you press "Next" after selecting the first option, a new screen that would basically let you "watch" the output of your selection, prior to actually doing any burning? Then if something is missing or you've included too much, you could go "Back" and re-select?

-Zac