I really fail to see how Nathan Brown improves our roster. He is a lock and a lock only. Too small and ineffective for the front row, and hasn't played any edge backrow since he was at souths, which was limited.
Sheens sees Hastings as a lock, then we have Joffa and Matamua, both much more effective then Brown.
Brown has people fooled because he acts tough and it gets mistaken for being an enforcer/leader. Block that out and just watch what he actually does and show me one run in the last 18 months he has made a genuine dent in the line and gained reasonable post contact metres. He makes zero impact.