Make it possible to swap usernames.
It would be cool if you could swap usernames. I for example own a cleaner name than the one I am on right now but I gained like 11K followers on the one with the less cool name. (I wasnt bothered by it at the time but I am now getting to a size where I wanna take it more serious and the cleaner name would be sick). ALSO it would be cool if you could contact someone with the name you want and ask him/her if he/she would be willing to give his/her username to you.