Manchester City suffered heavily last season, one of the reasons was the absence of Rodri and it added up to their poor performance last season but I believe they have made provisions for that position. I also believe without Rodri Manchester City can still be a strong team they cannot depend on him forever.
True they can't depend on him forever but is really bad to make your team be strong because of one player, it will definitely back fire. Rodri's absence made other clubs to see Manchester City as a small club that they can joke with, honestly last season wasn't what I expected of Manchester City and Pep Guardiola as well, everything he tried to build went offline and it was as if he had no idea on what to do next. Now same incident with the same player, I think is time to take that bold step and forget about Rodri and get somebody to take that spot if not they're going to continue with the struggle of last campaign.
Manchester City really suffered last season, and to be honest, I wasn’t expecting them to be that bad last season, but unfortunately, they did not perform well last season, and it was so disappointing. Although, as you said, you are right; depending on one single player or two in a squad is really a mess, and I feel like it is among the reasons why Manchester City was affected. I just hope they will get back stronger next season because if Manchester City experiences the same thing as last season, it won’t be funny at all.