Good analysis and I don't know whether it was the right call to leave Mbappe at home, I really don't know. But everyone knows that Mbappe is far away from his best level. Something is going on and he can't deliver what everyone expected from him. But I have to reaffirm that Mbappe is playing bullshit most of the time since he came from PSG. It is not his game so far and nobody understands what the issue is. Even Ancelotti doesn't know, but he would not let the public know. Mbappe is out of shape in my opinion. I remember his games at the World Cup when he went furious and destroyed the opponent. For some reason he can't do it at the moment although he has all these top players around him feeding him with opportunities.
The opportunities aspect isn't enough I think not enough cross were to him since he arrived at realmadrid, I did watch some of realmadrid games and I noticed that though that didn't still justify his is performance recently as it seem to be fair though but not as how he used to when he was at PSGnad like you said his performance at World Cup, don't really what's up with that actually because I some him receive some clear chance to make a goal happen but he missed them .
Maybe he still hasn't get used to it :)or there's just totally something wrong with him recently.