Bayerns midfield were dominated vs Dortmund and lost, Sociedad drew Barca and Real could play Casilla in midfield and still beat Gijon.
FYI Busquets is fantastic defensively, Gomes towering presence and has stellar combination of power and agility, Rakitic hardworking for creative player (like twice more then Pjanic easily). It works in their system to have such type of players (tho midfield is their weak point now), while ours clearly required dynamic midfields who stretches things and cover lots of ground, and comfortable in both phases easily. Vidal and Pogba could go to wingback, near our box, opponents box off and on the ball in strong fashion. Current midfield cant handle even a fraction of what they did, its a mismatch, its clear to see and it heavily effects our gameplan. Its about balance, our entire midfield doesnt need to have towering physical presence or work rate, but ATLEAST ONE should have it, with both Pjanic and Khedira it leaves a huge hole, and it hasnt helped we missed Marchisio for majority of the season and in his place is a turtle like Hernanes, it litterally screams come at me.
Regarding Real, Zidane actually handles their tactical short comings in midfield well enough, both Kroos and Casemiro out for a long time, and he sets up the team in fairly safe and conservative way that makes sure midfield is assisted by backline alot, plus Bale/Vazquez dropped down to make it 4 man midfields. Modric works hard (genius perfect midfielder, wish we had him), and Kovacic isnt a slouch who plays it very unrisky (barely goes forward much), its only James who is at any given moment a liability off the ball, but vs likes of Gijon it can be tried, but vs bigger opposition wouldnt play as CM, more Isco or Vazquez. Also their midfield just has too much quality technically to mess with, something we cant say.
And its not only about work rate and physical presence, but we lost alot of skill and X factor too, both technically and in leading the team. Those teams you mentionned still have that. Ours besides being physically weak is recovering from losing tangible quality in both directions, the safety of having someone who could get the ball and just shrug off opponents and move it forward to break patterns has been missed alot, as much as the physical presence and stronger defensive capability that ensured we won back possession quickly in last couple seasons (this quality is super underrated, because how often do you see our current midfield get to the 2nd balls first?). We are so passive now in middle park its litterally insane to not see it as an issue.
It remains to be seen if he will become good enough, but it makes perfect sense we interested in Kessie, exactly the type of elements we need (besides being technically clumsy player), he both is so freakishly determined that he sniffs out and gets possession ball in any way he can, but also strong enough in his stride that he can defenitely just shrug off opponents like a bull (only 10 days ago he dominated Strootman and Nainggolan like they didnt exist) and take possession forward:
He is kinda akward but generally forces his way through forward or is stuck on opponents like a bad rash when getting back possession.