1. Add a bedrock nether spawn point. 2. Set maximum increase of challenge requirements to 200%. 3. Improve shop. 4. Reduce the island level gain of stationary water. 5. Add a public enchantment table. 6. Fix donation board. 7. Add a PvP arena. 8. Reduce bid increment. 9. Increase maximum logins from an IP address. <Server, not SkyBlock> 10. Add rank upgrades. Most of these have been listed by others, this is just "described in short sentences quickly.".
This is a great way to go, lots of these improvements have been asked for and this is a great summary of everything that is needed to make skyblock an amazing area once again. Hoping these get implemented!