Maybe, but what if KDB or Sterling have one of their fairly frequent off-days? You're losing a match winner and replacing him with an energetic but fairly mediocre player.
When you lose 'ability' in the middle in favour of 'solidarity and energy' it hinders the other technical players in the team because firstly, they have nobody to help them control the game through possession, and secondly teams can easily double up on them knowing they don't really have to focus on Fernando, Fernandinho or Delph because neither will hurt you with the ball.
Do you not think some of our forward players look scared, ok maybe scared is too strong a word, maybe hesitant in possession? Always looking for the safe pass rather than expressing themselves and committing defenders.
Now, look at it from another point of view. The team is so unbalanced with Yaya in central midfield and so vulnerable to counter attacks, do you not think that hesitation or fear of losing possession stems from that lack of confidence in the rest of the teams ability to regain possession?