So what you're saying is I should make my ideas as to how to keep an ultimate happy ending go viral in hopes that one of them will be used?
On a less flippant note, after playing Episode Ignis in chronological context, the value-add to Ravus' story is so high that I think chronologically is the best way to play even for those who don't know the ending (though they still shouldn't watch the credits). It slots in so perfectly that it's almost shocking to think it almost didn't happen:
1) The radio and NPCs of Lestallum are still talking about Jared's death and Calligo's recovery in Chapter 8. Killing him off as part of an extended Altissia setpiece is timed perfectly.
2) Likewise, there's a ton of radio and Cape Caem NPC chatter about what Ravus' deal is. Revealing his changing allegiance by having him save Ignis takes a background curiosity and makes it as important as it deserves to be.
3) The same radio and NPC chatter makes a big deal out of Ravus' arm, which Episode Ignis explains. In doing so, it also helps explain the daemon boss fight in Chapter 13.
4) By making Ravus' change of allegiance front and center, it makes the radio and NPC chatter about his pending execution both hit harder and make more sense. He wasn't executed for failing, but for intentional sabotage.
5) When Episode Gladio is added chronologically and Chapter 13:2 is played before Noct's path, it results in Ravus being consistently relevant from his first appearance in Chapter 5 to his daemon boss fight.
The sheer weight of the things explained in Episode Ignis makes it feel far more like cut-and-restored content then new additions. I suppose it's a good thing that it wasn't, but it's hard to imagine there wasn't some plan to address those things in Altissia.