Saul doesnt have a risky passing style. Key passes and creative passes to make opportunities aren't really part of his game and so far this season out of 3 matches he's made 0 key passes. His passing is to keep the ball. Despite not being in good form he's almost top 3 of Atletico's passing accuracy, with 3rd place Llorente at 82.9% passing accuracy compared to Saul's 82.2%. Atletico don't want to have all of the ball, thats not part of their gameplan. Their gameplan is to move the ball quickly and break on teams. While Saul is very unlikely to be the one who plays a defense splitting pass to open up a chance for a teammate, he can play a quick simple pass as part of that Atletico gameplan to move the ball to another player.
Saul has everything else though. The form he's currently in is not what you'd want if you bought him for a hefty fee. McGinn's form is more what you want but we'd need more than the few games we've seen so far in the premier league to want to pay what it would take to buy him