The FigJam toolbox to add stickers could be improved imo (e.g. bring back dock & resize ;-)).
For custom FigJam sticker libraries, it would be nice to also have a keyword search bar at the top inside the library. To only search within a specific library. We have a library with stickers for low fidelity mockups for example, I would like to search only in that when creating a mockup.
It would also be handy to select and drop a bunch of stickers on the board at once. If you could search and filter, then drag to select multiple, this would be very helpful. Or even just a way to select multiple items by clicking and then dropping them.