Smashed together a list of small things that would improve upon Spiral Knights,

Improve Servers(done)

Accessory Fix Update(done)

Unlock the Jelly Green Giant:
Not even an unused asset just one that is currently locked behind a wall and clearly functions when special access is permitted. It should be as simple as slapping a energy gate like a danger room on the wall that blocks that room off, don't know how much spaghetti is involved but seems like an easy ask. The locked off content is in this level https://wiki.spiralknights.com/Aurora_Isles/The_Jelly_Farm

Gunner Helm/Armor Recipes
Move Gunner Helmets and Armor Recipes to the Hall of Heroes: These recipes clog up Basil's inventory and have long been frowned upon as it is very painful to search for one particular gunner armor at Basil out of the 120ish recipes. Additionally they appear to smother all the other recipes players often seek out Basil for. If one were to observe his list of recipes the problem makes itself obvious. https://wiki.spiralknights.com/Basil

Guild Hall Permanent Upgrades:
Guild halls have become somewhat outdated in that they cost huge amounts to change and maintain in particular the Environments and Themes should be permanent unlocks similar to how personal colors, eyes, and height modifiers work in the style kit. Allowing guilds to unlock them but only pay a small fee after unlocking them if they want to change them. This would revive guilds more which is a key cornerstone in Spiral Knights.

Make Zee Cores a sprite consumable Material
I assume this niche material was locked when sleep wasn't available, it's common now it should be consumable and my sprite needs to go down for a nap.

Add mixmaster/orbit gun screenshake on/off toggle
The screenshake is a annoying thing to experience overtime, if you own one you get tend to get used to it but other players weapons effecting you is not enjoyable.

Add Sprite Food Machine to Guild Halls
Replace one of the two alchemy machines. Specifically the "Alchemy Room" is prime real estate to place the machine, two generic alchemy machines serve no purpose so make one for Battle Sprite food alchemy.

Remove Wicked Whisker Requirements for non-black kat armor recipes
The only real interest with wicked whiskers is making the black kat line armors, the others really don't need such a high entry cost.

Add status rolling on shields through punch
Status rolling is currently only possible through crafting shields.

Adjust Spur Sword Line
Holding charge attack immediately after releasing a charge sometimes cancels the attack projectile.

Feel free to mention other issues, this definitely isn't all of them.