I have spent the last 10 years wishing for a proper midfield. Longer actually.
The problem started with Flamini and Fabregas: good with the ball, decent energy and pressing, but propped up by Hleb and Rosicky playing very narrow and then very good and athletic individual defenders in Sagna, Gallas, Toure and, to a lesser extent, Clichy. But that team and midfield were still rubbish when pushed back, they had no physical presence, and were not good enough tactically from a defensive standpoint.
That was obviously after moving away from a snarling, kicking, powerhouse midfield platform in the form of Gilberto Silva and Patrick Vieira. I know there is more than one way to skin a cat, City have proven that in this League, but boy you better be good elsewhere if your midfield is going to leak like a sieve and collapse like a souffle under pressure.
It has just gotten worse and worse since.
It is just not okay that we are fielding a 5'5" guy in Torreira that is built like a small child and can't run or compete; or Guendouzi who can't tackle, has no physical presence and is every bit the green 20 year old in terms of tactical understanding; or young Willock who is as weak as Torreira at this point in his development and as green as Guendouzi; then there's Granit Xhaka: can't run, can't tackle, thick as a brick even at 27, and even in his best games will give it to the opposition right in the spots where you can't afford to.
Luiz and Sokratis are not good players, but neither are most of the centrebacks in this league. In my opinion, they are a definite problem and need to be sold because we need good centrebacks, not run of the mill. However, until we change the midfield and move away from this idea that a midfielder's first job is to create, or to get ahead of the ball and score goals (fucking hell), rather than to run, hustle, tackle and balance the team, we will continue to fail.
A god damn decade this shit has plagued us for. We are not a proper team because we have no midfield.