Inspired teaching certainly includes discussion, but it does not, nor should it, exclude powerful discourse and instruction.
I do not know the perfect balance between discourse and discussion. It varies with the individual teacher and promptings of the Spirit. Unfortunately, the discourse method is sometimes overused at the expense of meaningful discussion. In the process of correcting this, however, the pendulum occasionally swings too far in the opposite direction, and teachers abandon any discourse for the sake of discussion as an end rather than a means. To rely solely on one method at the expense of the other may be discounting the most effective way to teach a given doctrine to a given group at a given time.