Just like how the crystal flower garden got a re-visit in May, perhaps there might be something plot-worthy to be done with all the creatures encased in crystal that are hidden in the cavern underneath that gazebo? Especially since the Griffon was being kept in that room, it makes it super mysterious. What are all those creatures doing down there? Were they monsters/animals that the Temple, for lack of a better term, "ate" by trapping in crystal and draining their life energy? Are they the pets of other long-gone gems, like the Griffon was? Can they also be released? And if so, would they be helpful or harmful? There's probably lots of different avenues a plot involving those creatures could go.

Also, similar to how the Mole Queen event played out, plots that involve the town and/or local NPCs and that maybe explores how they feel about all the Gem activity, or even just their reactions to how assorted events are handled? That always makes the setting feel more inhabited. I know that's also a lot of extra work probably so to lighten the load on the Mods and any NPC-playing, perhaps events that affect the town could be followed by a sort of NPC "post"/statement from the Mayor/Mayor's Aide or maybe a "Census" of the population of some kind with optional quotes from citizens or the like?