I agree, could be very usefull. I think it was suggested during some past beta tests too. But keep in mind that whatever you would discuss in such a forum.... you still need to report bugs to patchou, and when you see somebody discovered a bug on the forum, that doesn't mean you shouldn't report that bug... ppl report bugs in diffrent ways, all reports combined could make the diffrence between a fix or not. However, if everyone is gonna report the same it won't help either.
But i think it's good and will probally improve the overall quality of beta testing
.