If it was up to me, I'd be benching Rooney, Mata and Memphis until Christmas, and then taking a look at Lingard, Pereira, Wilson, Young and Fellaini to see if any of them can contribute more than the star names, if given an extended run of games. Our first choice attacking players (with the exception of Martial) really haven't done enough to justify being regular starters, never mind being in the team every game; only Memphis seems to have been dropped for his poor performances.
Pereira looked promising in the League Cup though not perfect by any means. Surely worth giving him some mins to show what he can do. We need more creativity.
On the pre-season tour, it was clear to anyone watching that our A team attack of Young, Mata, Memphis and Rooney, was no better, indeed possibly worse, than our B team attack of Lingard, Pereira, Januzaj and an out of form Wilson. Nothing has happened since the season started to change that view.