All Manchester City fans are happy that KDB is back and fully fit. Just as you said, he has already saves the team in two different matches, his presence is indeed incredible and will boost Manchester City’s hope in any competition because he is indeed one of the best midfielders and playmakers in the world right now.
They got Kevin De Bruyne back, but they are missing Haaland right now at the same time, those two were the best duo in all of football world last season, and they haven't played any games together this season so far I think, or if any, that must be before KDB got injured. So City is not even at 100% right now and will take a while, need to get Haaland back, and both those players in 100% shape.
I am not convinced with Haaland’s performance this season, maybe it’s due to De Bruyne’s absence. Nevertheless with or without him, if KDB is present in the team I don’t have any doubt so missing Haaland in the team is not a problem to them because KDB will create chances for others to score.
Actually all Manchester City not happy with Haaland current condition have absent and not confirming he will ready on next months or few weeks left before playing on 16 round. One side, Manchester City fans are celebrating after Kevin De Bruyne recovery from injury and made excellent debut last match against Newcastle United but on other side Manchester City have losses Haaland due injury.
I don''t think enough with Kevin De Bruyne only because Haaland is another one most important players for Manchester City, Haaland become top scorer for Manchester City in Champion League and premier league, losses him give bad impact with Man City get difficult winning bigger ratio goals on every match.