I still think if we signed Ramos it'd be to partner Rojo primarily. Both are comfortable moving towards the full back, and in the system we play the #6 has to be comfortable dropping in to collect the ball and functioning as the third CB if needs be.
Would not be surprised at all if Caf favourite Smalling struggles to have as good a season as he did the last few months of last season. LvG prefers technique over athleticism. That was made even more obvious when the likes of Herrera had to play as a #6 instead of the likes of Fellaini or Jones who had actually played that position before.
In possession of the ball for example, I believe LvG would like the side like this
De Gea
Smalling - Rojo
Darmian - Carrick - Shaw
Bastian - Morgan
Di Maria ---------------- Memphis
Rooney