The rose petals of Beauty and the Beast were indicators of the Story Limit of Optionlock. The “timelock” on Miguel was not part of the Story Limit. It’s fine, but it creates a double ending (similar to Ratatouille and Speed).
When it comes to the Main Character Concern of a storyform, it’s not what “concerns” the Main Character that is in question, but rather where the source of inequity is from a personal perspective from the Author’s point-of-view.
What are they saying about Miguel and Past that is problematic?
And I understand that Hector is “concerned” with his daughter’s memory leaving - but is that really where he is introducing conflict into the narrative? I can see the Authors using Memory as a Benchmark for his Concern, but I don’t see him actually impacting or influencing through problematic memories.
A single instance of a memory is not a Concern - it could be a Signpost - but it’s not a concern that lasts throughout an entire narrative.