I would be using the Q&A Forum type more often however, it's greatly flawed because it lacks the ability to have a conversation around the Question and each answer. Comments are needed.
More detail:
Currently you can only post Answers to a Q&A topic. This is a problem when people want to get more information about the question. Do do this, they will need to post a comment or two and have a mini conversation before posting an Answer. This is normally done on other sites (Stackoverflow etc..).
For example:
The issue if not being able to comment on a topic is the full discussion is lost with a bunch of "answers" and it makes the entire thing a mess.
SO, here's the feature request:
1 - Allow ability to post multiple comments on the original Question/Post
2 - Allow ability to post multiple comments on each answer
3 - Allow Author/Moderator/Board Setting to enable/disable comments at the Topic/Forum/Category Level
4 - Provide ability for the moderator to promote a comment to an answer and marked best answer.
Here's another example of helpful comments being used vs. posting answers to have a conversation:
