We've played Hayden and Hendrick there too, they aren't good enough. If we're missing Shelvey for half a season he needs replacing with at least a loan signing, ideally someone like for like.
There were definitely a few occasions where he got left 1 on 1 and handled it brilliantly, the fact he didn't seem to do much showed how comfortable he was with and without the ball.
He might not, and I would be satisfied with Harrison but why sell ASM? We don't need to, I agree in the future if he doesn't improve his output he should be replaced but we're desperate for wingers so selling our best one would be madness imo.