You guys need to remember that the red card did not happen at the 80th minute, but around 10th or so. So basically City is playing with 10 men since the beginning and while they got 2 goals, it's really difficult to man-mark on the extra man. This is like 2v1 situation on all of the pitch. Blaming Guardiola for this is silly imo. He can't do anything about the decision that happens in the case of Mendy vs Adama which leads to Wolves' goal.
but I doubt it's possible with their squad. They have cup competitions too remember!
I'm not sure about that. IIRC if they go through the semis then it's UCL, FA, and Premier League. They probably get extra 2 or 3 matches per month for that. Anyway, Liverpool 2nd squad ain't that bad, and with the return of Matip, Dejan, Fabinho, etc, it's not so bad for them.
Minamino also comes in January, so that's an extra option. He can cover for Firminho or play as AMF, or in a very extreme case can be the backup for literally any forward or midfield position.