I think we all understand that while blocked shots are nice, generally it's not a good indicator that a guy is a solid defender. Ibaka is a prime example imho. I think this guy is a ty, ty man defender with horrific basketball IQ, but he blocks alot of shots so he gets overrated as some elite defender. This video nicely summarizes just how overrated Ibaka is.
He's guarding Battier, finds himself in the low post area with Perkins and then COMPLETELY FORGETS HIS ASSIGNMENT because all he's focused on now is anticipating a move by LeBron and blocking the shot. Nevermind that Durant is already doubling him, and Perkins is already down low to help. Thus Battier gets wide open for a 3.
The Thunder will rue the day they gave this guy big money, especially if it means they have to let Harden walk.