1. - What if the Warden could reach into small player-sized spaces to catch and/or attack them? They could be led away by other players if they throw a snowball at the Warden, or the target could maybe use an item that emits vibrations for a short amount of time in order for said player to ender-pearl through a small hole between the Warden and the wall. That could support Survival multiplayer and Adventure Map creators.
2. - How about some new Minecart Variations? (Yes, I know that they probably won't be touching minecarts much at all this update.) There could be a Prismarine Minecart, crafted with 5 prismarine shards and a conduit/heart of the sea. It would go much faster submerged but would require some type of fuel, maybe the new amethysts, or even copper. -- Or even a Firework Minecart, crafted with a minecart and 2 firework rockets. The riding player could use flint & steel on the minecart to go around 50% faster for the duration of one rocket, even 3x duration rockets can be added on, and if the player has elytra on, the minecart could glide, or even fly. The minecart would become a normal cart when both rockets are spent and when it's on the ground. This could support Adventure Map creators and Server minigames.
3. - What about Bioluminescence? It could be a kind of slime block variant found in local cave oceans or mesh caves or crafted/harvested from the glow berries in the lush caves with a hoe. Hell, maybe even in the deep dark when you break some of the sculk blocks. It would be used to make bioluminescent lanterns, Redstone lamps, etc. The Biolumi. lights would emit no light, but it would prevent mobs from spawning in a radius twice the size of a torch's light. It could dim any other lights in the radius significantly, could make light sources emit an interference particle, or could even benefit the light sources in range, making their radius about 1.5x bigger. Maybe a new glow-worm mob could be added in as well that drops some bioluminescence. It would spawn in the same places the Biolumi. could be found. This can support Builders and Survival multiplayer greatly.
4. - What if you could wipe the rust off of Copper Blocks to weaken the stone in the deep dark so you can mine them? You could combine the rust with an excavation brush to wipe it on the D.D.stone in order to mine it, but not harvest it, even with silk touch. Or maybe you can mine it with silk touch, and using some rust, the D.D.stone, some sculk blocks, and an eye of ender/ender pearl, you can make some kind of fast travel teleporter to prevent the long travels between the player's main base and their deep dark outpost. It would work similarly to how the ender chest breaks, you would only collect the skulk and D.D.stone if broken without silk touch. This would support Speedrunners and Adventure Map creators.
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