In general agree with you that he's better central although think probably his best performance for us came when he played on the wing vs Arsenal last season - that might just be because he played against Monreal at LB though.I'd personally say it's what we had today.
It's also not the fact who he's playing with, it's more "where" - when central he provides a bigger threat. Drags defenders out, they have to man-mark him and Naismith and it just gets too much for defenders. Plus he can defo play on the shoulder of defenders cuz he's pacy and strong, so that's a + in his favour.