Kinda realized I've made a lot of suggestions! So, to help myself stay organized, as well as let anyone curious read my stuff, I've decided to collect links to the nodes together here.
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Gear
Weapons, Armor, Shields, etc...
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-Echo Weapons
-Gleads - A New Type of Weapon
-Slime/lichen themed bombs
-Bomb: Unfinished Business

-Green Jelly Gear (1-star)
-Tundralisk Sets and Form Changes

-Shattering Shields

-Troika Family

-Swarm/Core Trinkets and improvements

-Sword: Whiplasso Lasher: Disarm and Capture
-Shard Bomb/Cage Bomb

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Gear
Battle Sprites
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-Blue and Green Battle Sprites
-Nexus Star
-Sprite Snacks
-Chips
-Harnesses, Reskins, and the Future

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Monsters and Levels and Areas and Such
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-New Levels/Tiles - slow and fast
-More monster-specific habitats
-Wandering Wardrobe

-Mission Type: Radar Pings

-Pickup vials as the Blood of Deities - mini boss fights
-Wind Spirits - Monsters Weak to the Shield Bash
-Monster: Oblerton

-Capture the Core - New PvP Mode
-[Map] - "Lights Out!" Lockdown

-Haven Clock Tower

-Necromender
-Changes to Souls
-Wayward Mecha Knight
-Sighted Shankle

-Derelicts and new minis
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Mechanics/Gameplay
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-Arcade Suggestion - flickering elevator icons

-Level Map - add a little button to the interface
--node: 101314.

-Spiral Archive - sk should have an elaborate "pokedex"

-Accessory Recovery - classify these as "tickets" please

-Gift Boxes - Let's get more out of them

-Pickups - Sponges and general changes

-Hide the HUD! If you want.

-Fix NPCs

-Instead of the Prize Wheel...

-Ember Spawner Art Proposal

-Friendly Fire option

-Proposed changes to Rarities, Heat, Forge, and UVs: Several Ideas in One Big Post

-Troubled Triplets (GunnerUpdate armor helmet recipes)

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Aesthetics, Reskins
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-Musical Instruments as Accessories
-Cake Head Parasite Aesthetic
-Shard Bomb Bandoliers
-Crest of Life
-Cat Tunes
-Inward Auras

-Downed! and Return! animations as usables.
-More Body Mods: Walking, Idle, and Idle Random

-Forge of Finesse - Get Yourself All the Proto Colors

-Battle Sprite: Reskin: Drakon = Rooster = Phoenix

-Bubble Pipes

-Nefarious/Troublesome Prize Box
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Guilds and Guild Halls (includes guild related aesthetics and furniture)
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-Furniture: Weapon/Item Stands for Guild Halls

-4 Guild Hall Improvements: Balcony, Roofs, Themes, Speed Zones
-Calmed Creatures for Guild Halls

-tiny suggestion: icons for plant type furniture.
-classify as intangible or tangible

-HOMECOMING PART I: Social Changes
-HOMECOMING PART II: Shuttle
-HOMECOMING PART III: Ready Room Renovation
-HOMECOMING PART IV: Guild Lab
-HOMECOMING PART V: Guild Stash

-March of the Tortodrones stuff for Guild Halls

-Boxes as Furniture
-Materials as Furniture

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Event/promo Suggestions (that have missions and such)
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-Black Kat Spawn Improvements and Lore (Katasrophe Monster).

-SK Anniversary Event Suggestions
-Dark Harvest Event Suggestions

-Shroud of the Apocrea Event Suggestions
-March of the Tortodrones Event Suggestions

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Related to promos (that are more aesthetic than anything else)
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-Splashy Thoughts
-Storm? Rage? SQUALL! (Blue!)

-Art Wants to be Seen

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Other
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-Flash Sale Protection from Scams

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Polls
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-Top 10: Interface/Social Poll

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The Ideas of Others
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-I totally support guild aesthetics.
-Arcade Run Prizes: A set amount of things based on effort
-Cheevos
-Accessories and Not being StUpId
-/die and /unstuck
-Toggle ER Button, DC issues
-Rare Monster Drops
-Catalyzer Ideas
-A few new pickups, pickup belt upgrading
-Efficient Sprite Food Feeding
-Simplify Orb and Crystal Rarities
-Crafting "Reset" sprite foods
-Battlepods are Boring
-Heating fixes and more reasons to be in the arcade