De Bruyne is a key player obviusly but i think Manchester City can sub him very well, in fact i really think this injury helped Manchester City thinking in the future of the team. Now they know they can play very good without him, so we can some news in the next summer transfers window.
Manchester City was not competitive due to the absence of key players, until they appointed Pep Guardiola in 2016/2017 EPL campaign, Pep is widely recognized as aggressive coach that has full ambition for the team to become great. He doesn't lack the full tendency but always curious about the performance of his team, ensuring for placing alternatives options in situations were the intended primary ones failed. Kelvin De Bruyne is injured and has not been with Manchester City for months now, probably might return in January because he's gradually making some vital recoveries, most football lovers can't wait for Kelvin De Bruyne to start games on the pitch for the Citizens.
Always if the coach is experienced then definitely the team goes towards higher status. Although Manchester City Club is the center of discussion at the moment, they are also strong in terms of playing power. So I would like to say that an experienced coach must be appointed so that Manchester club can be in a fast position for the future. In the current position, the defensive department and the attacking department are both strong, but due to lack of proper monitoring, Manchester City Club cannot go and attack at the right time. So it is important to appoint a course as a proper consultant from outside.