I'm not holding 2020 against anyone.
If 2019 Robles is his ceiling, is that a bad thing? Not every stud prospect will flourish like Harper, Rendon, and Soto. A lot of teams would be happy with Turner or Soto outcomes, we've just grown accustomed to star prospects becoming superstars.
It's a bad thing in that the expectations for him a couple of years ago were that he'd be a five-tool top elite-level CF.