Cos he has found his role within the team - 20, 30 mins towards the end where he can be an impact sub and where it doesn't kill his body. A lot of the frustration came when he was a regular in the side, pushing his limited fitness and not having much contribution most of the time.
There's no target man similar to him that we have on our books so he can be an effective Plan B when he comes on. Oh, and the mackem-slaying too.