He isn't showing much so far but after so many people wrote off Bartra they should be patient with Roberto. He's young and inexperienced, let's not throw him under a bus yet.
You're right and I hate to be such a naysayer on him but let's be honest and analyze the Roberto praise for a second.
A lot of times people only applaud him for what they want him to be, not what he is. When he does something good on the ball, "He's better than Thiago, doesn't make sloppy passes, etc.". When he doesn't even do that, "He's so good off the ball, movement and intelligence, unappreciated gem like Busquets". It's just searching in the dark for reasons to praise him and create the image that he actually is what people want him to be rather than him actually showing some high aptitude and then getting praise for it.
He is young and he can develop, so the door obviously shouldn't be shut on him. It's just that a lot of the high Roberto love is because he's tagged with the unlucky role of being everyone's romanticized heir-apparent to Xavi and in a sense Thiago too. Due to this, they create a over-reaching player profile and expectation for him only for it to be extremely idealistic. Whatever he's done so far hasn't warranted some of the odd commendation he's received, but that's not to say he's trash or incapable of amounting to anything.