>>113913415it doesn't have bad writing because they don't give us every little detail, it has bad writing because it promises and hints that they will, but they never do.
The chest was open in the movie so the audience themselves could wonder what was inside, and even the commentary jokes about "what could possibly be there, am I right guys?".
We wouldn't be disappointed if they never ever hyped us up for things that were never happening. All the way back in S1 with Lapis claiming that the crystal gems were not to be trusted and set up this whole baggage she has with them, only for her to never interact with them ever and never bringing up the mirror issue ever again. The show promised a lot of things and failed to deliver.
