In our group, we have to model the state "needs discussion" for Bugzilla.
Therefore, a custom RESOLVED - to be discussed status was introduced. The appropriate group of people searches for issues that have this sort of "resolution" status and discusses these offline.
In my opinion, this is not the proper way as the bug/feature clearly is not resolved if there still is need for discussion. This is also reflected in the standard life cycle of a bug. It is sort of misleading, as "needs discussion" items show up in your list of resolved bugs.
One way I can think of, would be to make a sort of "virtual user", representing the group that has to be involved in the discussion. This has the advantage, that one can search for the bugs easily. One could also setup a mailing list to notify the users.
I wonder how one can appropriately model this needs discussion state of a bug in Bugzilla 3.0.x. (And: what is the Mozilla-way solution?)
As with any software system there are a multitude of ways to address your need.
Before you start with mechanism it would be good to think about requirements.
Do you want bugs the need discussion to be counted as "open" still, or do you consider them "resolved". Do you even collect those types of metrics?
The requirements I derive from your question are
If those are really the requirements, and you don't care that "for discussion" bugs are showing up as resolved for metrics etc, then I think what you have is probably good enough, except for point 5.
Some other alternatives
But, as I say, think about what you're trying to achieve first, and then choose the mechanism based on that. There are different trade-offs around the amount of bug-fiddling you have to do to make them all work :-).