Give Todo a vibraslap.

the Sharp Modifier for weapons giving vanilla weapons the slashing that cursed tools have. Not expecting compatibility with other mods (though it'd be cool,) I just wanna be able to use stuff like the lance and knife.

Toggle for Kurourushi that removes the extra arms. They aren't always there in the manga, and it's easier to keep track of two.
Adding onto that, a skin for Kurourushi matching the more simplistic pitch black design that was used most often for him.
Final Kurourushi suggestion: Give him more ridiculous moves! He was controlling swarms that could fill a tunnel on the road, have that reflect in his technique! It doesn't have to be anything crazy new, it could just be variants of things like Choso's blood wave to represent the massive swarm.

Give Hanyu (Jet Hair lady) a defensive buff and Punch, both on her head so she can fight like in canon (flying headbutts.) Also an F activation that has her shoot forward to ram into things.

Give RCT Output the same alt activation as Sukuna RCT Output, or just merge the two. Shoko is literally the leading expert in RCT, why is she not able to use this? You can't even give Sukuna RCT Output to others.

Cursed Tool suggestion: Dragonbone. Builds energy upon impact/cutting, and expends it to boost the blade forward while adding a buff to its cutting power. Was used by Maki post-Shibuya.

RCT limb toggle that works like CER. You can select which limbs will/won't be regenerated, though you probably shouldn't be able to regenerate a forearm without the arm or anything like that.

Give the guns in America Domain cursed energy bullets if they don't have them already, and give the option to adjust the energy damage of the bullets if they do.

Easy Cursed Tool suggestion: Nanami's tie. Works like the wrapped form of Miguel's Rope, enhancing punches and such. Instead of a loose rope mode, the tie can be used to apply Ratio.

New Shadow Style.Gives Kusakabe (and maybe Miwa) a variant of Simple Domain that automatically allows movement and has 3~4 extra options. 1: You can alter the size of the Simple Domain at any time. Should work with 2: When toggled, anyone who enters the Simple Domain is automatically slashed, using a damage effect similar to Sword Dash. 3/4: A slider determining how many times the slash can/will occur upon entering, and a toggle that ends the Simple Domain when the slashes land (off by default.)