At least there would be a centalized place to find out all the latest Extras bugs.

Then of course most used apps have more chances of getting more volume of bugs, more votes... But this is somehow democratic as well. If there is a CRITICAL bug in a less popular that requires HIGH priority the bugsquad can help making sure priorities/severities are right if the developer doesn't see it that way. Then many normal bugs of many normal apps will probably be out of the Bug Jar. Fine, happens just the same in the regular Jar as well.

The ranking of bugs 'needing love' will be probably interesting and will help developers getting more testers and feedback, and a better sense of how relevant and annoying their bugs are for real users.