While Scott McTominay’s flying start to life at Napoli has most applauding his impact, one familiar concern continues to hang over the head of the former Manchester United matchwinner. It was a dilemma Erik ten Hag – and the Manchester United faithful – found themselves grappling with throughout last season. Without Scott McTominay’s heroics – his last-gasp brace against Brentford, those late strikes against Chelsea and Aston Villa – perhaps the increasingly under-fire Ten Hag would have been out of a job a long time ago. But did McTominay’s goal threat offset the weaknesses elsewhere in his g…