I'm with you Donald. I actually thinks it's a very astute signing and all the indicators point to him being happy in Brisbane. Happy off the field usually translates to good performances on it.
It certainly helps, but also internal motivation, how he fits into the team, the desire to play hard, train hard and play for his teammates and coach, where he fits in the bigger scheme and identity of the club, how the fans perceive his transfer - are all equally going to play a HUGE part in any import's performances.
Brisbane has, IMO, been a graveyard or a place for enigmatic/confidence/impact players to simply plateau or regress.
Cases in point: Barba, Mundine, Ben Te'o, Scotty Prince
There's either too much pressure to immediately perform from media and fans, a lack of passion or identity or perhaps too many other high profile players to pick up the slack for the imports to take ownership of their time here.
Here: Blair is a infamously lazy player. He's not a forward leader. His best is arguably behind him and overstated due to it being in a illegal Storm team - he's best off the back of others hard work. He's got nothing really to prove, on a decent pay check and little real competition for his spot.
I'm guessing Bennett will lean heavily on Parker and McGuire as workers (with Garbutt/Wallace in rotation) with Blair and Thaiday roaming impact players.
What is the psychological angle Bennett will use to motivate Blair... I don't know.