Can see you are making substitutions without considering how players play. You will make a great PL manager
Obviously I would not take anyone off if they are having a good game, but two young players I want to see more of are Vlasic and DCL.
I reckon if Sigurdsson was not here Vlasic would be one of my first names on the team sheet and I want to see DCL continue his development too.
Also my other option would be to sub Rooney and move SSigurdsson into the middle to accommodate Vlasic. I think he'll be great for us one day.