Pulling the FPSOV also disabled the ability to deploy the spoilers didn't it? That didn't help in the reject attempt.
The biggest issue is the lack of control checks. Whilst there may well indeed have been a fault/flaw with the gust lock mechanism which may have actually engaged as they started rolling down the runway- IF the crew had of been more professional and done a successful FULL control check prior to that takeoff I would expect that at the first sign of lack of control when barrelling down the runway their decisions and actions would have been different. I know mine would... Let's see I just did a successful control check before applying takeoff power, now my elevators are jammed and the lock is on and not releasing. No hope of getting airborne let's abort!