He'd only started 27 league games in the previous 3 years at Roma! It was a shocker, he's clearly a talent but had no proven history of playing regularly, cost a massive amount and was replacing in my opinion one of the best cm's we've ever had. Oh yeah and he was injured. It was a bad move.
All well and good, but he recovered from that injury, and hasn't exactly been riddled with injuries, for the past two seasons. He was bought, with the intention of playing him, when recovered from the injury. He recovered from the injury, and was shipped out.
Injury hasn't been the reason he hasn't been playing for Liverpool Football Club. The reason he hasn't been playing, is because we shipped him out, getting fuck all in return.
Let's assume that Aquilani is the worst player in the world, and flat out refused to play for the club, you still don't ship him out for two seasons, with jolly fuck all, in return.