Delightfully meta joke for the title, I am all in on meta, and yet while reading I have some doubts on this adventure. mopstly related to some interesting elements that are just too generic.
There is no GM support whatsoever: asking me (as a GM) to write down 26 hyper-specific, absurd weaknesses for the simulacrums doesn't make my life easier, and I think modules should offload prep work, not assign homework.
Also, there are no stat or power baselines. Being system agnostic shouldn't mean completely devoid of mechanical context. There are no stats or guidelines for how dangerous key NPCs are. Is the Librarian a high-level archmage or just someone who shushes loudly? Having to build every stat block from scratch defeats the purpose of buying an adventure.
I really hope for an extended version with a bit more support for the poor GMs out there who already have to do a lot of work with unreliable players and overcomplex rules.