Bernardo's best qualities are that of dribbling and shooting. He can beat 2 men put in a cross or go inside and shoot. Thus making him the best right winger (yes better than Mahrez). As a CM he's not as good with his passing as David. David (and Gundo) can 1 touch pass better to beat a press and can control the game. Yes Bernardo can play there, but he's most dangerous and can create more chances out right.
Anyway this is a Rodri thread and I know people sometimes favor more defensive attributes, but Pep, before Dinho, always favored players who's ability on the ball outweighed their defence. Busquetes, Xabi Alonso and he even wanted Jorghino. I know this is the PL and Dinho has done great at distributing the ball and that makes him unique, but though possessing the ball more and not losing it means the opposition can't attack you as much. If you have a defensive person like Kante who would give away the ball more, you give away more chances. When it comes to defending especially counter attacks it's a team effort. The CB's are pushed high and when balls are lost in dangerous positions everyone including the wingers track back. It's more positional play. Rodri is tidy on the ball, he's decent at defending, but isn't really blessed with pace.