The problem that Madrid have to face right now is their lack of players in defense because we know there are some players like Militao and currently Alaba is also not known how his condition is which makes this a little difficult because of the empty positions for Madrid and even they in the last few matches tried with Carvajal or Tchouameni as their anchor defender.
This is a little worrying but fortunately their attacking line is still very good so far so it can still be covered but indeed this also needs special consideration because if you see conditions like this forcing Carvajal or Tchouameni who are not in a comfortable position for them this will also not be effective in every match.
Madrid needs to improve this area in the upcoming transfer market, Los Blancos must add one or two players in that position to avoid too big a risk, along with another need, namely a pure striker. I think Ancelotti is quite genius in responding to various situations experienced by his squad, his experiment in rotating players to various positions has been quite successful so far, not only is Tchouameni getting a different role, Camavinga also often fills the left back post to cover Madrid defensive line deficiencies.
Ancelotti certainly understands the risks he faces, I think Madrid management is just waiting for the transfer window to open to add new players. For Madrid midfield I think it is one of the best at the moment, in the front line I think even though it can be covered by Bellingham, in fact Madrid really needs a main striker.
Actually, rather than saying it was a rotation I would rather say that it started out of necessity because of the lack of players so it forced players who shouldn't be in ideal positions because it was the last resort but it still worked out well for some players like Camavinga who was sometimes deployed at RB or now Tchouameni who is deployed at center back.
It's just that as I said before even though it still looks good but they should try to find new alternatives for some players even though it's currently good but forcing Tchouameni is not always going to work.
The striker problem can still find someone, it's just that if they are still quite confident with the current attacking squad, it is still not too urgent compared to their defense.