All fair points and if we were in Europe I would agree with you, but the fact is we aren't and there just aren't enough games for a 3 CB rotation. I don't think that does anyone any good.
I don't view it as Eze or Maddison. I view it Maddison next to Eze. Both Maddison and Eze have experience playing a deeper role. If Emerson is going to be our RB, we need more from our CM alongside Maddison. Both Skipp and Sarr haven't shown they have the attacking capabilities yet. I think it would be unfair to think Bentancur comes back in and hits the ground running straight away and even him, outside of last year, doesn't have a history of contributing offensively.
We also don't have anyone to backup Maddison. Lo Celso had a nice preseason but certainly you can't put too much stock in him and I still think we'd sell for the right price.