http://bugs.winehq.org/show_bug.cgi?id=58597
--- Comment #2 from Ken Sharp imwellcushtymelike@gmail.com --- Bugzilla already has severity ratings: https://bugs.winehq.org/page.cgi?id=fields.html#severity
I don't think linking the bug severity to the AppDB makes any sense, as even a major bug can have a workaround and this is only evident in the comments. Any critical or blocker bug potentially affects every application and linking such a bug to every application on the AppDB would be a bad idea.
I'm happy to take a shot at this when I have enough time to sit down and look at it properly, but there are more urgent outstanding issues.