I think Innersloth should conduct a internship for ideas.
anyway here are my ideas,
1.Making cams work like a night vision device in electricity sabotages. I don't think its fair for cams to work clearly on darkness. So the person who is using cams on lights out can only see names because the color will be inverted or disturbed .
2.Provide accessories section for players, add accessories like nightvision goggles and uv lights that can track player steps for a few seconds .
Example: if yellow kills a crewmate and leaves in like 3 seconds he leaves a footprint for 5 seconds. which can only be seen with a uv light. I think it will be interesting
3.Make player names appear in yellow or any other color if you have played with them before and if you click on the name you can see how many games you have played with him/her.
4.Custom modes- I know a lot of people have suggested this