There is a lot of If's and buts there. Why would you think GLC would have started he hasn't so far although I think he should have. There's no doubt Sanchez would have played as he and Dier have been the CB's this season other than that I think Nuno would have picked the side he did.With due respect, I disagree with your post.
If we had the three quarantined SA players available for this match, I think our starting CBs would have been Dier and Sanchez. When Dier was injured, Romero would have replaced him. I doubt Rodon or Davies would have played in this game, although they might have some game time in the upcoming midweek game. Davies was at fault for one goal and possibly another.
Our starting RB would likely have been Tanganga as he would have been aware of Zaha’s quality and would have been better at handling him as a RB. Not putting any blame on Royal though. Tanganga is more defensive minded than Royal, and would likely, not have been caught up front when Zaha burst down the line , prior to Tanganga’s first booking. He’d also have his CBs covering him, so he might not have made that foul on Zaha, earning him his first yellow. Remember that the score was 0-0 at the point when Tanganga was sent off, so it might have been a different situation if we had eleven players for the full game.
As for the starting midfield, I would have expected GLC to have started over Winks. GLC would have provided better support to our attackers than Winks.
It will be interesting to see the side that he puts out for the weekend with everyone available with the possible exception of Son.