Craftable accessories and costumes, more customization options (full gradient color selection, 2-3 colors per character, ability to recolor armor/weapons), wider variety of weapons, maybe even different "classes" so there's good reason to have and level more than one character - talent trees, skills you learn, etc.

Remove energy costs for trinket and weapon slots once you reach a certain level; instead, find some other way to create a black hole for energy to keep the market going ( understanding that, obviously, what keeps the game going is the cash purchases ) - maybe make -all- items individually purchasable with real-world currency or E (add costumes and accessories to the depot)? I know that's not likely to be a super popular idea, but, really, if you can get it by trading E or Cr that you bought, the difference is minimal and just removes a step.

I'd expect a fun, nostalgic 8-directional projectile bomb, balanced armour sets, a meta not skewed towards guns and a couple of swords, a glass-cannon bomber-exclusive set worth using, and a fish hat.

•I'd like to be able to aim tortofist charges.
•Swords shouldn't make Knights stop walking.
•Bombs shouldn't make Knights move slower while charging.
•Autoguns shouldn't make Knights stop moving while firing.
•The Grim Repeater needs a two-handed animation.
•Cutters should deal less knockback, and only on second hits
•Maskeraith's Deadly Shadow Cloak should be changed to allow weapon charges.
•Weapons need a "check" for whether or not a charge or normal attack is being performed.
•Guns and bombs need animations, with bombs having gibs and pre-explosion lightrays.
•Calibur charges need to deal knockback at the end of the charge, not the beginning.

This is assuming that by "Spiral Knights 2" you mean "Spiral Knights HD Renovation". I want the original story to continue, rather than an entirely new plot. I'd like for more fundamental details to be added into the story, rather than being inserted piecewise in the later missions, such as where Ozlo is, what the Skylark looks like, what Isora was like, what the Morai did and why we were driven to extinction at their hands. We're too far into the missions to just now introduce flashbacks, and as such SK needs a complete mission overhaul. I think I'm gonna go make a thread.