Probably bugs, at least as well documented descriptions should not be in a comments area, but instead be in a real bug post/response area..
Now I guess the main problem will be the reporting: to wit are you reading a bug or is it some user misunderstanding or lack of documentation that might make it seem to be a bug to a user..
I don't know that in these flexible forums that there will be any easy answer to self-reporting of bugs/issues vis-a-vis releases of the different Mint versions
--user comments about issues in the general sense, will seem to fix most issues users will have, , and if it is a bug, the likely-hood is that it may already be posted and responded to on Ubuntu (or launchpad..)
And the response to launchpad reports in Ubuntu for example might not be the best user experience either, even though that is their forum for bug reports
--I also see complaints about that process.
As far as the volunteers go, they don't self-select themselves they are picked in some mysterious way/method that we, as users will have no insight to..
--no clue what it (volunteering) might depend on..