Firstly, it would be more than "delaying your deck one turn". You would have to reset up, which includes using another convert (and, from what I've seen, the majority of heroless decks only use Holy Grail. To compensate, you'll have to include more; which reduces the defense).
I never at any point said that Saul/Paul should be your only hero, but almost anyone would agree he is, by far, the most useful hero in heroless.