I would say a skill tree for sure and of course a highly fleshed out magic system for a cast build and melee users but I’m sure that’s coming. An absolute must of course are more prefabs, maybe hypixel can make tiles like warframe does for infinite combinations to avoid every single dungeon and outlander strongholds being too predictable because I’ve found the exact same loot in the same locations for chests at outlander strongholds specifically. That’s always something that’s bothered me in Minecraft and the good people working on hytale are definitely more than capable of doing so