For me the important factor in this is Hutchinson. Get him fit and I'd play Van Aken.
Letting Hutchinson sit in front of the centre backs will give that added protection, (could even revert to a back three) whilst allowing Bannan, Wallace and Hooper to play ten or twenty yards higher up the pitch.
Whilst Van Aken has looked great with the ball, defensively he has definitely been suspect. Hopefully having a better defensive shield in the form of Hutch will help him out whilst not sacrificing our ability to play out from the back.
Personally i think it's crying out for three at the back with Reach and Hunt down the wings but I cannot see Carlos changing from 4 at the back anytime soon.