[+] Introduces a nickname length limit, the default is 16.
[+] Introduces an option to prohibit nicknames that are the same as another player's username.
[+] Introduces /nick reset which allows you to reset nicknames.

Other Updates:
I'm looking into modifying player name tags, and I've done some experimentation with it, though I'm yet to decide the final approach I'll take with it. It's going to be a long-term goal for this plugin, but I'm not prepared to provide any ETA at this time.
Another future goal is adding a GUI for the /namecolor command. This will likely come out before any name tag update.
I've done some more work on this plugin's website, available at https://wiicart.net/namecolor
Any questions? Contact my discord, @wiicart.