They could've had Valigarmanda be the level 99 trial instead, where this time Zoraal Ja is the one to release him. We still kill Valigarmanda, but it's a short lived victory as it's essence is still lingering since Valigarmanda was extremely strong even by normal tural vidraal standards. Then have Zoraal Ja suddenly seal it away, similar to how the tural vidraal were sealed in the role quests, and then he flees. Fast-forward to the final zone: Zoraal Ja is the level 100 dungeon boss. We punch him in the face and he devours the souls. Now the level 100 trial starts as his trial form, and just like phase 1 of the trial, we beat him down fast because he has used so many souls his normal body just genuinely cannot take it. But he has one final trick up his sleeve and infuses himself with the essence of Valigarmada, essentially transforming into Shinryu 2.0 [The devs/writers pretty much made Zoraal Ja a piss-poor bootleg version of Zenos, so I'll just fully lean completely into the complete bootleg part] and then the actual level 100 trial fight starts. Yes this would require pretty much a complete overhaul of the story, hence the cringe, but given my own personal feelings about Dawntrail's story I'd happily take a complete re-write.