Ok, here are my suggestions for update 2.

1) make it so the more fingers a person eats the stronger they become and the limit for it would be 20 fingers.

2) add all shikagami

3) make it so megumi can summon mahoraga from his power menu

4) and make a power for mahito to turn someone into a full curse

5) here are just some charater suggestions, nanami, nobara, geto, yuta, rika and kenjaku.

6) power suggestions, RCT [reverse cursed technique] you activate it with the head and it starts healing the person who uses it and another verison could be if you activate the hand and touch someone it heals them.

7) skin suggestions, shibuya ark yuji.