There are two things I'd like to see more of. More in depth discussions like you said. There seems to be little effort to reply when somebody asks a question or posts a discussion.The other thing would be more feedback and discussion of the writfag stuff. Everyone keeps asking for writefags but when somebody bothers to post a story there's very few replies or feedback, it's no wonder they stop bothering.
So basically I think there's plenty of effort to start things but little to keep them going and develop them. The Dashfags reply to everything and have sprawling conversations with lots of people as a result. The Twifags are much more chilled and seem to have the cigars out in the NTT. This may be a good thing for a number of reasons but it does make for slower threads.