Yes, exactly Camavinga, Tchouameni and Valverde all belong the midfield department of a team, but we've seen Ancelotti deploy out of position more often than due to the presence of Modric and Kroos in the midfield, but now with Toni Kroos gone, and Modric ageing (also signing just one year extension) which likely means he's playing his finally season at the club. Tchouameni, Valverde and Camavinga will be expected to play more of their natural position as midfielders a lot during the season which would Real Madrid with less number of options, be it Valverde on the, Camavinga as Fullback or Tchouameni as CB, hence the need the to reinforce their backline, William Saliba would be a really great move for them, should they be able to secure his signature from Arsenal.
If you look at the typical game, what is similar to Kross is Cavaminga, who in fact is considered to be strong enough for both defensive and attacking types, his position is also as Central Midfield. Meanwhile, someone who looks like Modric is Valverde, where he is more of an attacking force and sets the tempo. For Tchouaméni, his original position is actually Defensive Midfield, but because so far the back line, especially the center back, has often been affected by injuries or other things, he is quite often positioned as the Center Back.
Therefore, it seems that Ancelotti's focus this time is to get defenders, especially center backs and others. So, it will return to all positions to be even more optimal. But whatever it is, all players will have their era, and now it is the era of the younger players who are fighting for Real Madrid. Yes, we're really waiitng for Saliba
