A pretty minor thing, but one I think would be a fun option:
Right now you can go into the wall at
Cherry's Tap Hall on Zheng Shi by intentionally getting in trouble and being "punished", which I enjoy, but there isn't any option to voluntarily sign up to be in the wall. An option to voluntarily signing up could include being paid more than the current way of getting in the wall, and the option to use a bio-plug to block off certain holes like the ones currently in the wall get. Another good option could be getting to have your top-half sticking out instead, like the viper and the rats currently do (although I imagine this would require more work to write additional scenes).