I interpreted that entire section as:

Rogue facsimile of a dead leader left with an imperative to sustain a "Living" world populated with what were, effectively (and heavily implied to be analogous to), ghosts of the living and that the protagonists' collective set of actions were done to send off the "Living" Endless as one may ritualistically do for spirits, ghosts, etc... symbolically letting them move on by having them finish a cornerstone moment there. And, the blackened electrope hearkened back to the sepulchers that the Yok Hui create to commemorate the dead.

Some of the aetheryte quests felt heavy handed with that idea - especially when I did them on Reaper, unintentionally.

After all, it is an entire area built from a misunderstanding about the idea of "preserving" memories of people, and the actions of that Preservation group ultimately mishandled those who had died by creating stitched together mnemonic copies who were only projected shadows on the wall (not really dissimilar, in a way, to the Hythlodaeus and other shades in Emet Selch's fake Amaurot). And, part of the theme of this section is the acceptance of an End, paralleling in contrast to Meteion's belief of salvation in annihilation.

And, a part of me liked the choice for an amusement park design for the space. The "one last good day," bit comes to mind and the reminder that playing on the playground, eventually, comes to an end. There is no magic utopia where everyone gets to play on the playground, forever.

At least, that was my takeaway I suppose.