I don't think that a forum is the ideal solution for bug tracking because IMHO you don't have a clear view of everything what is going on.
I think the forum is still a very good place to ask questions about how to use U++. The bug tracker would be there to report bugs and request features and not to ask questions.
Well, IME, quite often it is not clear whether something is bug or feature.
Meanwhile, many people are using "Search" in the forum as sort of "U++ knowledge base". Therefore I think it has benefits if all potential U++ bugs start as forum posts.