I think he could play further upfield as you say, he could also play LM and forge a good partnership with Rose. Also, ash showed he can play LB, however, I would say, DM is his least favoured position, as he doesn't protect his CBs, well enough or track runners with vigour. He may improve in these aspects but he also needs to pass forward more.He reminds me of Carrick. So many good touches, awareness of what is going on around him and cultured on the ball. But he is the man that feeds the guys that assist. So he goes a little un-noticed to a certain degree. Is obviously quality and I think he could do more if played further forward. Maybe Dembele should sit and it should be one of Benteleb or Mason?
Bear in mind the cross he delivered for Kane against Arse, we should play him left side and move Chadli to compete with Lamela for the RM role, play Dembele, alongside Mason and Eriksen in AM.
Although we conceded stack loads of goals, one of the corollaries is that we don't score enough goals, even when we dominate possession, we will have to play, Chadli, Eriksen or get people all over the pitch to contribute.