Thinking about the starting lineup and something worth noting is that Konsa had played the most minutes in the league out of the whole squad. He's also played in every European game (not full games) bar AZ away, and he played in the League Cup game.
So there's a possibility the juggling with Cash/Carlos is to give Carlos/Torres time to gel together because at some point Konsa will need a break too. Cash is getting a rest at the moment and possibly we'll see him come back in and Konsa sit one or two out.
Obviously there's a horses for courses element to it too.