Should just let him go but Rafa won't be allowed to bring a replacement in, he'd have to probably elevate Longstaff through further. Shame what's happened, I thought he looked a good prospect in the Championship in regards to breaking play and screening the backline, was great the first half of that season but tailed off. Had some half decent performances last season too but Diame was rightly phasing him out. Now, I don't think there's a lack of effort, although the half arsed run onto a ball threaded through the defence v Arsenal didn't do him any favours. Did his job well v Huddersfield but that's another Championship side and yesterday he was light years out of his depth.
We're just constantly repeating ourselves; he should not be starting against Man Utd at home 2 seasons on from when he was signed in the Championship. But we all know that already.