The game plan vs Adama is to close him down quickly and double mark him. Then you neutralize him as he is basically an awesome 1st man dribbler, but like Dembele, he doesn't have the ball control to beat the 2nd marker in succession and limited space. But he is not a player you just block and temper by sticking out a single fullback to guard him. He will pass that guy on pure pace and acceleration in the first 10 meters and/or yellow him pretty fast.
You can block Adama without much initial hassle, but this means somewhere else there is more space being created, and with guys like Ferran, Aubameyang, Pedri roaming around that area, instead of Jutgla, Luuk, and Abde, this can be dangerous for the other teams and good for us. Only the best teams manage to guard multiple players at once and still be quick, intense, and compact enough to not leave multiple gaps. And here is where Xavi comes in, to make sure we, on our own, are quick enough in passing the ball around to make sure these extra spaces get exploited well.
So, it's more like, we ask the questions with Adama, managers and other teams will try to counter them, which will instead open up some other doors. Both around Traore in quick combinations and overloads (harder to do since space is more congested), and in terms of quick switches of play for more space (more of a standard approach) - we did that well vs Atletico. A bit like how Neymar got all that space when Messi played RW in 2015, drawing up defenders and making teams overcommit to that side, since he was such a big dribbling threat. That's basically how efficient possession is built, by creating little fires in some area, opponents put more men there to put it out, and you instead gain access to the other areas that get freed up. But you have to pass quickly and set up your movement well, and work very hard in training to get precise and nonfloating long switches. Otherwise, all those new spaces and opportunities will mostly come and go unused, which is basically what happened in the last 5-6 years.