There's plenty they can say to get around that though. It's not like he's been crushing it over the course of 2-4 years. They can say they want him to cut down on ks, they want him to prove he can stay healthy over the course of a year, they want him to hit x amount at bats in the minors before coming up.
Having said that, I'm excited to see Robert too. I'm honestly fine with whatever they want to do whether it be calling him up this year or waiting til mid-April 2020.