We need to design it in such a way so it's easy to find discussions and to be able to jump into them and engage. For example how YouTube had it back in the days. Where you could find the videos with the most amount of new comments. This would be great because active users would be seen more.
Also another thing that is extremely valuable that currently is undervalued is the SBD liquid send system. That is what will make this Steem Blockchain worth the most in the long run. The Steem Blockchain surely should reward Proof-of-Brain.
Hive Mind will be interesting in that regard.