I don't think that's really a thing. Aurier gets up and down reasonably well. People have been saying this for every Rb we've had. We have always had attacking RB's and CM2 systems.If you have a system where you push your FB's up then your CM2's are always going to be needing to do more work, which gets particularly exposed when none of your CM's are really rounded enough, defensively good readers or dynamic enough, to pick up that slack. When we had Wanyama in there he was excellent at this.
Walker had brainfarts and was often guilty of giving the ball away with a sloppy pass when we were all pushed up, then we had Trippier apparently getting "out of position", now people are saying the same with Aurier.
It's one of the reasons why I wish we'd play a 433.