These are gonna be some skyblock suggestions that are a little out there and would be more difficult to implement, but would certainly make the game even better :)
Adding an island upgrade that makes a specific chunk classify as a guardian temple, so you can then create a guardian farm.
Adding a community end portal where a single end pearl is given as the reward for the final challenge that can be completed. Each island can only get one ended eye that would work in the portal. This would force 12 islands to work together (at least to a small degree) to open up the end. I would suggest the end be similar to resource world end; where perms are open, no claims, etc. This would also allow progression to elytra, shuckers, and be an awesome community event.
