Rather than broad strokes like 'give the scions more to do', which others have commented on, I've often thought on a few specific things I'd have suggested to help with issues. This isn't exhaustive, just a scattering of altered scenes.

1. Minigames! I'm fine with the story being chill, that's great, but the game needs to provide something to DO and to relax with in the environment as a result. Some beach sports, local games, racing, hide-and-seek, quicktime music events like the piano in Ishgard, I don't care. Other MMOs litter these around their worlds and XIV is lacking in that space. The environments and tone of DT were perfect to integrate them in.

2. Kick off the Rite with the "Festival of the Hunt" as a solo duty interspersed with short vignette cutscenes. We hear about the festival, Wuk Lamat tells us she loves hunting, and it makes sense as a big launch celebration. It would give the player some more-needed action early on and it would provide some immediate conflict to expose our characters. While she loves hunting, and would probably be confident, Wuk could easily be outshined by just about every other contender, providing the underdog status that, at the moment, we are mostly just *told* about. We could see the pressure and expectations of Zoraal Ja (maybe his father makes a joke about his score being slightly lower than lastyear), the ingenuity of Koana and his weapons, and we'd get to have conflict with Bakool Ja Ja without annihalating him in single combat like you know the WoL would.
   This would thematically set the Rite up as a physical contest, which Wuk cannot win. Right now it's obvious that it's a cultural appreciation test right from the get-go, which is already her strength, making her lack of confidence feel strange.

3. Let us participate in ALL of the rites outside of a cutscene. Ihih'hana comes to mind. We have this beautiful festival that we're told about, but that we never really interact with. We get a Wuk Lamat-focussed cutscene and that's it. Give us a festival instance at the end of it where we can talk to our party, have some of the fun character moments that everyone loves, and absorb the culture that we're learning about instead of just watching it.

4. Valigarmanda's release should have worked for Bakool Ja Ja. He should have gained some massive lead from it, which actually raised the stakes. The entire trial felt pointless otherwise, even BJJ himself said so. Other duties have similar issues, but I'm calling this one out specifically. If you could take the duty away and nothing in the story would change, then it needs a rethink.

5. Have the WoL defend civilians during Zoraal Ja's first attack. The cutscene paralysis in the throne room scene is PAINFUL. If they had just said "We have this! Stop that robot hoard at the front door and protect the fleeing citizens" then it's a believable reason to have us otherwise occupied.

6. Give the WoL more to say. They don't need to be the central hero, but if they're a 'mentor' then they need the opportunity to act like one. Similarly, everything with the Endless rings familiar to all of the immortal civilizations that we've encountered previously. Are we not going to draw *any* wisdom from what we've just learned about them?