The first party is the Pirate Party.
The first things I would add are the Dead Man's Basecamp, Darkway, and Rock Door, which contain crystals to forge new lightsabers such as: Darksabers (Umbra Crystal), Amber sabers (Amber Crystal), Cyan blade (Mix green and blue), Dark red (Vanadium Shards), and dark green (mix black and green), Orange blade (yellow and red crystals), maybe you could mix each one to get a cool color etc.
UPDATED: EVERY POSSIBLE TYPE (placeholder names, huge list)
ALEXANDRITE CRYSTAL (cyan) (RADIUM + FROSTICE)
LAVENDER QUARTZ (Light Purple) (ALEXANDRITE + INFERNAL)
CRYSOCOLA (Blue-Green) (RADIUM + ALEXANDRITE)
FLUORITE (Light Blue) (FROSTICE + ALEXANDRITE)
AMMOLITE (Orange-Green) (CITRINE + RADIUM)
APATITE (Yellow) (INFERNAL + RADIUM)
TOPAZ (Light Yellow) (RADIUM + APATITE)
JADE (Pastel Green) (FROSTICE + APATITE)
ONYX (Black) (FROSTICE + RADIUM + INFERNAL)
LAPIS LAZULI (Bluish Black) (ONYX + FROSTICE)
SERPENTINE (Pastel Dark Green) (ONYX + RADIUM)
AQUAMARINE (Sea Blue) (FROSTICE + ALEXANDRITE)
MALACHITE (Bluish Greenish Black) (RADIUM + AQUAMARINE)
KHOONI NEELAM (Light Purple) (INFERNAL + AQUAMARINE)
BERYLLIUM (Navy) (AQUAMARINE + ONYX)
SAPPHIRE (Blue) (FROSTICE + ONYX)
CITRINE (Orange) (APATITE + INFERNAL)
CLINOHUMITE (Dark Orange) (CITRINE + ONYX)
DIAMOND (White) (CRYSTAL SHARD)
EMERALD (Light Green) (RADIUM + DIAMOND)
GARNET (Dark Red) (INFERNAL + ONYX)
HACKMANITE (Faded Navy) (BERYLLIUM + ONYX)
KUNZITE (Light Purple) (INFERNAL + FROSTICE + DIAMOND)
SPHALERITE (Yellow-Orange) (CITRINE + APATITE)
Spinel (Pink) (INFERNAL + DIAMOND)
Sunstone (Faded Orange) (CITRINE + DIAMOND)
Moonstone (Gray) (ONYX + DIAMOND)
This gives a use for the hammer item, since it has no use in the game. I would also add a pirate sabre lightsaber, called the lightsabre.
The next thing I would add are types of warships, which can fire cannonballs. This also gives P3D a new type of war, nautical combat. You can assign ship owners and keep them in your igloo by buying a dock in the game (has a limit of boats depending on dock size.) It takes multiple people to handle a boat, one will steer and one will have to fire cannons.
Some new pirate items will only be able to bought from a new store, the Pirate's Booty.
Such items are: Admiral hat, eyepatch (opposite side), commander and admiral coat, and new guns like flintlocks, blunderbuss shotguns, and hand cannons. Ammo is not blaster charge but pellets. Some pirate traders can trade gold and crystals for pellet ammo.
Some more rooms to add are: A rebuilt south beach, a bigger liberty house, an expansion to the Radion like some more radium items and animals, and the shop that is off the coast of Dead Man's Rock. Will ye be brave enough to sail the seas and search for buried treasures? Dead men tell no tales.

Next is the Dune Party
On Stone Island, the fortress of Navatar is created. It contains multiple new additions. Dune Lord armor (based on Odin's Armor from OLDCP), Dune Prince Armor (Based on Thor's Armor from OLDCP) and Dune King Armor (Glowing ripped abs). In order to get the armor, you have to purchase it with strength. A cool addition. Dune Lord costs 2000, Prince 4000, King 8000.
There are also helmets, Dune Lord Helmet (Odin's helmet) Dune Prince Helmet (Winged Viking Helmet) and Dune King Helmet (Blonde braided manly braid)
There are also new axes and sabers.
The Sith Axe Saber, The Double Sided Axe Saber, and Dune Sabers of multiple colors. Along with a new saber gifted only by the Grays, the Axe Lord Saber.
There will also be a Mithril Mines, where you can mine Mithril easier with a mithril pickaxe. Be careful though, the deeper you tread in the mines, the more dangerous foes you'll find. Upper Levels: None
Upper Mid levels: Goblehin
Mid Levels: Goblin Berserkers
Mid Lower Levels: Orchelin
Lower Levels: Orchelin Warlords and Goblin Warlords
Deepest Level: Spider Queens, Balrogs.
The deeper you get, the more rich the mithril. It's a double edged sword.
More mithril weapons will be added, such as the mithril roundaxe and mithril cleaver. Mithril Chainmail can also be forged, making you immune to arrows.
Perhaps in the deep far west of the Stone Island, a castle of some estranged tentacle monster might lurk.
Time will tell in this new update.

Behold the new Forest update, the Forest expands in many ways. New antlers types, such as the white antlers and the spring green antlers.
Be able to ride deer, moose, and reindeer that lurk in the forests. Will you find the elusive Nahar of Araw, a mystic deer that has supernatural power.
Will you be able to forge a stag sword for yourself? Or forge forrester themed armor?
We have new weapons, like the Wooden Sword, does no damage but blocks attacks. Each person gets one at the start of the game. Forest bows and Forest spears will also be new additions, able to reach farther distance with a spear. There will also be a campfire item able for purchase at the furniture shop, and foxes.
In a forest, if you say: "In the name of Orome" certain things can happen.
For example, by using some of your strength, you can manifest smokeless flames, speed, and lightning.
Some new room additions are Forrester Hall (located in the South), and far north of the south, the remains of the Great Forest and the sunken Gold City? Perhaps even find The Temple of the Djinn?
Shall you become the greatest shaman king?

The Mining party adds a new addition, the drill. It's the fastest way to get ores and create the best experience for mining quickly. It also adds drill protective gear, since drills can be very dangerous. The previous caves created will be expanded with more abilities to get ores. Bigger caves and bigger pitfalls to your death, what could be better? Just make sure your drill doesn't blow up!

The Airshow begins on Penguin3D. Planes from every time period emerge, including the first Da Vinci Flying Machine. New zeppelins, Huey Choppers, B-52s and more!
The first Airshow will be at Dorval, and will have a Game of Flight to go with it, getting someone a custom plane as the winner.

The Molten Caverns have opened further. Tread further and find Black Steel, a steel melted within obsidian crystals, making it near indestructible. Combined with Vanadium it creates MOLTEN ARMOR. It gives you resistance to flames and lava. You may have noticed Das has a volcano, sometimes, when standing near it you will receive volcanic ash, combine this with molten ingots to create VOLCANIC weapons and armor, imbued with flames, allowing for complete flames and lava immunity. You can also forge new Black Steel Armor, four new types. Black Orc Armor, Black Witch Armor, Black Legion Armor and Black Necromancy Armor. All of them stylish. Be careful when you tread too deep into molten caverns, Firelings will often pop out of the magma, to assault and ambush inattentive players.

Finally, the Underground party.
New types of armors never seen before. Copper armor, which gives resistance to lightning and electric based attack. Titanium, which is the hardest armor but the weakest weapon.
New caves will be added to every island, except Achto and stone Island. The South will receive The Mine Cave, a secret outpost which contains a break room. Providence will receive Dead Man''s Catacombs with Curium, Das will receive Lucre Caves with Emerald, Dorval will have Nova Crystals in the Sunder Mines, and Cobia will have Opal ore. All new caves and ores for you all to deposit.

These are just some inspirations for Damen, since whichever one gets picked will most likely need some ideas. VOTE DUNE.

these ideas are very good

Ill bear this in mind for sure, not everything but many ideas help