Our eyes confirm that McFred, as we loving describe the dynamic duo of McTominay and Fred, hasn't been working well at all for us this season. However well they did or did not perform in the past, they're just not getting it done in the present. And apart from Ole, no one is surprised at their lack of effectiveness.
Even if McFred were to hit their very top gear in the next few games, playing both means one less attacking player. That's not an optimal situation when the strength in the squad are our attacking players (with all due respect to our defenders).
With Rashford coming back we really can't be having two of Ronaldo, Sancho, Greenwood, Bruno, Pogba and Rashford sitting down when the first whistle is blown. (Cavani understands the situation he's in, as does Lingard, and by now it's clear as crystal blue day in fall that Ole has no use for Donny Van de Beek.)
Go with Matic for as long as he can go, commit mayhem against the opposing keeper, then sub off Matic and one of the five attacking players named above with McFred and salt away glorious victory, onward and upward.
Starting XI, when all are fit:
De Gea
AWB Varane Maguire Shaw
Matic Pogba
Greenwood (or Sancho) Bruno Rashford
Ronaldo
If this crew can't score 2-3 goals by the 60th minute against all but the top 3 of the other 19 sides in the league we are truly fekked anyway and Ole will be sacked in May. And if we're fekked anyway then why not at least give the fans the best possible chance of actually winning games (instead of settling for ugly draws), rather than wheeling out McFred in the starting XI and praying that we nick a goal in the 87th minute for the one nil win?