I've got to agree with Mikey here. I acknowledge that Deulofeu has superb talent and potential but I don't yet think he's prepared to start away against United. We all go on about how well he slips past defenders effortlessly, but I get so damn frustrated when he tries that 15 times a game and pull it off six times. Sure, it looks ace when it comes off, but we can't afford to gift possession to United like he did several times against Stoke. The one that stands out was the little flick he tried that didn't come off. Lost possession and almost led to a Brek Shea goal. Unacceptable.
You are right up to a point, but you have to take these risks to have a talent like that in the team. At this age it is better to encourage him to go for it and not stress about mistakes too much. It happens, as he is learning. For that flick, the better option was of course to take it into him and hold possession but if we drill it into a player not to try something like that you can lose out on the times when they will try it at the right moment and create a goal out of nothing.
To me it's a very Moyes/Rafael attitude. Minimise the flair and make risk management an important part of a game.
I think we can afford to allow him to slip up.