This looks really interesting. A big issue I see with a lot of bug trackers OSS projects use is that it’s impossible to get someone to actually submit. Usually, because they don’t want to manage yet another account on that tracker. Making the tracker email-centric might reduce the initial friction to getting the user to submit issues.
Also, including a --bug-report CLI option, or a GUI button, that launches the user’s email client with some of the details filled out already (a pattern I see a lot in OSS android apps) means that it might be a lot easier for a user to submit a ticket.