Let me just preface this by saying, that I absolutely do not think that Rafinha is obsolete or an irrelevant player. He's a good player and he was great against Inter. However, he definitely doesn't create a whole lot and he's a far inferior dribbler compared to Dembélé. This doesn't mean that he's bad, it just means that Dembélé is excellent in both of those aspects.
7. not being a turnover machine
Actually, there's not a
massive difference between the two of them in terms of giving the ball away. If you look at misplaced passes and times dispossessed and compare it to the total number of touches, while also keeping attempted dribbles in mind, there's not a big difference between them. Dembélé on average has five touches for every ball he gives away. Rafinha has about eight touches for every ball he gives away. Rakitic and Busquets, for comparison, has 11 touches for every ball they give away. When you consider how many more dribbles he completes and how many more chances he creates, I'm surprised that Dembélé doesn't give the ball away at a much high rate than Rafinha.
Consider this. Rafinha on average has 82 touches per 90 minutes of football. Dembélé on average has 69 touches per 90 minutes of football. At their current rate that would mean that Rafinha would lose the ball through misplaced passes, unsuccessful touches or being tackled 10 times in his average 90 minutes of football. Dembélé would give the ball away 14 times. When you consider that Dembélé completes over two dribbles per 90 minutes and provides almost three key passes, compared to Rafinha's 0,5 successful dribbles per 90 and less than one key pass, the difference in balls lost is completely negligible.
What is definitely true is that Rafinha is much more of a defensive contributor, recovering 3,5 balls per 90 minutes compared to Dembélés 1,5. If you choose Rafinha over Dembélé, you choose an approach much more geared for retaining possession and defensive stability. But trying to claim that Rafinha can hold a candle to Dembélé offensively is dumb in my opinion.