I'd love for us to sign him permanently as I think that if he settles down and has some stability that he'll turn in to an immense player, a proper centre midfielder who can get up and down the pitch and impose himself offensively and also defensively.
I'm not sure about another loan move though. It would take hime a while to get some fitness back after his lack of playing time, and as others have pointed out he only showed flashes of brilliance amongst several games of mediocrity in his previous 2 loan spells, particularly the second one.
I'd be happy if we got him, as we need bodies, he knows the club, and he's undoubtedly got tonnes of ability. Just not entirely sure that a loan move would be all that beneficial for us.